 Patent Application Title |
Patent App Num. |
Date |
 Method of locating the tip of a central venous catheter | 20130123597 | 20130516 |
 Methods of locating a tip of a central venous catheter (“CVC”) relative to the superior vena cava, sino-atrial node, right atrium, and/or right ventricle using electrocardiogram data. The CVC includes at least one electrode. In particular embodiments, the CVC includes two or three pairs of electrodes. Further, depending upon the embodiment implemented, one or more electrodes may be attached to the patient's skin. The voltage across the electrodes is used to generate a P wave. A reference deflection value is determined for the P wave detected when the tip is within the proximal superior vena cava. Then, the tip is advanced and a new deflection value determined. A ratio of the new and reference deflection values is used to determine a tip location. The ratio may... |
| Ventricular fibrillation detection | 20130116585 | 20130509 |
 Systems and techniques are disclosed for determining the onset and offset of a ventricular fibrillation event and for distinguishing ventricular fibrillation from noise. In some examples, an electrocardiogram (ECG) signal is obtained; a transform is applied to the ECG signal to obtain an analytical pair, the analytical pair including the ECG signal and the transformed ECG signal; a speed-amplitude is determined from the analytical pair; and an onset of a ventricular fibrillation event is identified based at least one of a value of a cost function of the speed-amplitude over a window and a quantity of occurrences the speed-amplitude crosses a threshold over the window.
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| Detection of drastic blood pressure changes | 20130116587 | 20130509 |
 A cardiac-activity based prediction of a rapid drop in a patient's blood pressure during extracorporeal blood treatment is disclosed. A proposed alarm apparatus includes a primary beat morphology analysis unit bank of secondary analysis units and an alarm generating unit. The primary beat morphology analysis unit discriminates heart beats in a received basic electrocardiogram signal, classifies each beat into one out of at least two different beat categories, and associates each segment of the signal with relevant event-type data. The event-type data and the basic electrocardiogram signal together form an enhanced electrocardiogram signal, based upon which the primary beat morphology analysis unit determines whether one or more secondary signal analyses should be performed. Depending on the enhanced electrocardiogram signal's properties, the bank of secondary analysis units... |
| System and method for the analysis of electrocardiogram signals | 20130116588 | 20130509 |
 A microprocessor configured to receive and process digitized signals derived from an analogue ECG signal is provided. An example microprocessor comprises a beat detection unit configured to receive the in-phase and quadrature phase band power signals, calculate a band power value and an adaptive threshold value, and compare said band power value with said adaptive threshold value to detect a QRS complex of the ECG signal indicative of a detected valid beat; and an R peak detection unit configured to receive the digital ECG signal and information about the detected valid beat, select a portion of the received ECG signal as a first time window around the detected valid beat; determine the location of a first R peak position; and perform a time domain search in... |
| Method and user interface device for displaying electrocardiograms | 20130109988 | 20130502 |
 A method of displaying electrocardiograms comprises displaying a reference electrocardiogram; and displaying a measured electrocardiogram so that the reference electrocardiogram and the measured electrocardiogram are displayed in an overlapping state.
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| Adherent device with multiple physiological sensors | 20130085347 | 20130404 |
| An adherent device to monitor a patient comprises an adhesive patch to adhere to a skin of the patient. At least four electrodes are connected to the patch and capable of electrically coupling to the patient. Impedance circuitry is coupled to the at least four electrodes to measure a hydration signal of the patient. Electrocardiogram circuitry is coupled to at least two of the at least four electrodes to measure an electrocardiogram signal of the patient. An accelerometer can be mechanically coupled to the adhesive patch to generate a signal in response to at least one of an activity or a position of the patient.
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| Method and apparatus for classifying cardiac arrhythmia | 20130085405 | 20130404 |
| A method and a device for classifying cardiac arrhythmia, using an electrocardiogram (ECG) signal, are provided. The method includes receiving the ECG signal representing an electrical activity of a heart of an individual over a period of time, the ECG signal including ECG beats. The method further includes converting each of the ECG beats into symbols. The method further includes identifying an arrhythmia class indicating a type of cardiac arrhythmia associated with the individual from arrhythmia classes indicating respective types of cardiac arrhythmia based on the symbols representing each of the ECG beats.
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| In-vivo calibration of contact force-sensing catheters using auto zero zones | 20130085416 | 20130404 |
| A method for the in vivo re-calibration of a force sensing probe such as an electrophysiology catheter provides for the generation of an auto zero zone. The distal tip of the catheter or other probe is placed in a body cavity within the patient. Verification that there is no tissue contact is made using electrocardiogram (ECG) or impedance data, fluoroscopy or other real-time imaging data and/or an electro-anatomical mapping system. Once verification that there is no tissue contact is made, the system recalibrates the signal emanating from the force sensor setting it to correspond to a force reading of zero grams and this recalibrated baseline reading is used to generate and display force readings based on force sensor data.
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| Sparse data reconstruction for gated x-ray ct imaging | 20130070994 | 20130321 |
| When imaging a compact structure, such as a calcium deposit in a patient's heart, a slow scan (e.g., less than approximately 6 rpm) CT data acquisition is performed, wherein data is continuously but sparsely acquired during around a 360° revolution around the patient. Arc segments are defined that equate to one heart cycle (e.g., heartbeat) given the patient's heart rate and the speed of the CT gantry. Electrocardiogram signal data is used to identify sets of acquired projection data that correspond to each of a plurality of heart cycle phases during which the heart is relatively still. A sparse reconstruction algorithm is executed on the identified sets of sparse projection data to generate images for each heart cycle phase from the scan data acquired for that... |
| System for cardiac arrhythmia detection and characterization | 20130072806 | 20130321 |
| A system for heart performance characterization and abnormality detection comprises an input processor and at least one signal processor. The input processor receives, sampled data representing a patient blood pressure signal and a concurrently acquired electrocardiogram (ECG) signal representing heart electrical activity of the patient. The at least one signal processor, synchronizes the patient blood pressure signal and the heart electrical activity signal, identifies at least two points of a heart electrical activity signal cycle, integrates signal data values representing the amplitude of the patient blood pressure signal of a segment between the identified two points to derive an integral value over time duration of the segment representing an area under the blood pressure signal waveform between the identified two points and in response to the... |
| Atrial fibrillation decision apparatus, and method and program for deciding presence of atrial fibrillation | 20130060154 | 20130307 |
| An atrial fibrillation decision apparatus includes an acquisition unit that acquires a detected waveform signal indicating a detection result of an electrocardiogram or pulse wave, an RR interval calculation unit that calculates a parameter corresponding to the RR interval with respect to each frame on the basis of a spectrum of each frame obtained through frequency analysis of the detected waveform signal acquired, and an RR waveform signal that indicates a temporal change of the parameter, a power calculation unit that calculates a temporal change of power of a predetermined frequency band of the RR waveform signal, and a decision unit that decides whether the calculated power satisfies a specific condition and outputs information indicating whether atrial fibrillation is taking place, on the basis of the... |
| Electrocardiogram monitoring devices | 20130053674 | 20130228 |
| The invention relates to devices and methods for monitoring cardiac function. Specifically, the invention relates to devices for secure placement of electrocardiogram (ECG) sensors (patches, electrodes) on the body of a subject.
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| Wireless ecg in implantable devices | 20130046195 | 20130221 |
| An implantable medical device such as an implantable pacemaker or implantable cardioverter/defibrillator includes a programmable sensing circuit providing for sensing of a signal approximating a surface electrocardiogram (ECG) through implanted electrodes. With various electrode configurations, signals approximating various standard surface ECG signals are acquired without the need for attaching electrodes with cables onto the skin. The various electrode configurations include, but are not limited to, various combinations of intracardiac pacing electrodes, portions of the implantable medical device contacting tissue, and electrodes incorporated onto the surface of the implantable medical device.
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| Methods, systems and devices for detecting atrial fibrillation | 20130041273 | 20130214 |
| Disclosed herein are various embodiments of methods, systems and devices for detecting atrial fibrillation (AF) in a patient. According to one embodiment, a patient places his or her left and right hands around left and right electrodes and a hand-held atrial fibrillation detection device acquires an electrocardiogram (ECG) from the patient over a predetermined period of time such as, by way of example, one minute. After acquiring the ECG from the patient, the device processes and analyzes the ECG and makes a determination of whether the patient has AF. The device may further be configured to provide a visual or audio indication of whether the patient has AF, or does not have AF. The device may be employed in a health care provider's office without the... |
| Mobile emergency response system | 20130035571 | 20130207 |
| Disclosed embodiments include a the portable medical apparatus that comprises (a) a patient monitor comprising a plurality of wireless biomedical sensors including an electrocardiogram sensor, a non-invasive blood pressure sensor, and a pulse oximetry sensor; and (b) a communications module configured to wirelessly transmit jointly compressed signals. The communication module is configured to transmit signals as a block of coherent data. Additionally, the communication module includes fast-joint coding and decoding, transmission error correction, information exchange between different layers to optimize network throughput, and adapts the Quality of Service (QoS) guarantees for each type of traffic offered.
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| Method and system for ultrasound image computation of cardiac events | 20130030294 | 20130131 |
| The method of one embodiment for ultrasound image computation of cardiac events comprises obtaining a first set of ultrasound data and a first electrocardiogram signal, obtaining a second set of ultrasound data and a second electrocardiogram signal, processing the first and second sets of ultrasound data to obtain first and second processed ultrasound signal events, relating the first and second processed ultrasound signal events to the first and second electrocardiogram signals in time, and determining a relative timing between the first and second processed ultrasound signal events. The system of one embodiment for ultrasound image computation of cardiac events comprises an ultrasound device, an electrocardiogram device, and a processor comprising a first module to receive and process ultrasound data, a second module to receive electrocardiogram signals,... |
| System and method of electrical current detection in electrophysiology study | 20130030482 | 20130131 |
| A system in combination with a stimulator system and an electrophysiology recorder system in delivering a stimulator signal to a subject's heart is provided. The electrophysiology recorder system can be generally operable to acquire an electrocardiogram from the subject's heart. The system can include an electrical couple in electrical connection between the simulator system and the electrophysiology recorder. The electrical couple can be configured to communicate the stimulator signal without loading an impedance of the electrophysiology recorder system on the stimulator system.
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| Multiple-energy x-ray imaging system and control method for the same | 20130022168 | 20130124 |
| A multiple-energy X-ray imaging apparatus and a method obtain a plurality of X-ray images when the heart of a patient is in the same phase by measuring the electrocardiogram of the patient. A sensor is installed on a handle or a foot stool to measure the electrocardiogram when the patient grips the handle or makes contact with the foot stool without having to attach an electrode to the body of the patient, which removes the inconvenience in measuring the electrocardiogram.
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| Methods, systems and devices for detecting and diagnosing heart diseases and disorders | 20120330170 | 20121227 |
| Disclosed herein methods, devices, and systems for detecting and diagnosing a heart disease or disorder in a subject from a prime electrocardiogram which comprises calculating at least one distribution function of the prime electrocardiogram and determining whether the distribution function is indicative of the presence of absence of the heart disease or disorder.
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| Implantable medical device sensing wireless ecg as substitute for intracardiac electrogram | 20120330171 | 20121227 |
| A CRM system enhances intracardiac electrogram-based arrhythmia detection using a wireless electrocardiogram (ECG), which is a signal sensed with implantable electrodes and approximating a surface ECG. In one embodiment, the wireless ECG is sensed as a substitute signal for the intracardiac electrogram when the sensing of the intracardiac electrogram becomes unreliable.
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| Systems and methods for quanifying and providing indicia of st-segment resolution in an ecg signal | 20120330172 | 20121227 |
| Systems and methods are provided for quantifying and providing indicia of ST-segment resolution in an electrocardiogram (ECG) signal. A receiver acquires an electrocardiogram (ECG) signal that includes an ST-segment. A processor processes the ECG signal to determine values for the ST-segment deviation relative to an isoelectric baseline. A user is allowed to provide a baseline signal to the processor. The processor responds to the baseline signal by marking a baseline ST-segment value corresponding to a baseline time. A user interface displays a linear graphical trend of variations in the measured ST-segment values relative to the baseline ST-segment value. In certain embodiments, the processor detects user-selected trigger events such as post-intervention ST deviation relative to the baseline time and the baseline ST-segment value, and provides indicia of... |
| Electrocardiographic method and apparatus based on bipolar, non-vectorial, truncal leads or real unipolar leads | 20120316420 | 20121213 |
| The present invention consists of a modification and a new method of today's art 12 lead resting electrocardiogram The modifications include: Elimination of connecting means to record today's art Leads; connecting means to connect a common positive electrode, placed on the left leg, to all the positive terminals of the electrocardiographic amplifiers; connecting means to connect the negative electrodes, placed on the chest to the negative terminals of each individual electrocardiographic amplifier; reporting the results of the electrocardiogram including all the digital data sets obtained and calculated by the electrocardiograph in a disk, and a remote safe Data Bank for easy retrieval. A method of reprograming the electrocardiograph calculator to calculate the second derivative of the maximal and minimal values of each structure of the myocardium... |
| Method for determining a heart period from an ecg waveform using image representation of ecg | 20120316452 | 20121213 |
| A method for estimating a heart period is disclosed. The heart period is detected from an ECG recording. ECG data is acquired, and converted into electronic ECG images. The data is processed to prepare for estimation of a heart period. The heart period is estimated based upon an average of intervals between a plurality of detected peaks of electronic electrocardiogram waveforms. The peaks are determined by taking a product of a filtered electronic ECG signal with a wandering baseline removed, a difference between the upper and lower ECG envelopes of the electronic ECG images, and a first order derivative of a derived ECG waveform.
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| System and method for providing access to an information handling system | 20120311699 | 20121206 |
| An information handling system includes a memory and a detector circuit. The memory is configured to store a first electrocardiogram measurement. The detector circuit is configured to receive a second electrocardiogram measurement in response to a specific combination of keys of a keyboard being pressed for a specific period of time, wherein each key in the specific key combination includes an electrocardiogram sensor on a top surface of the key, to authorize a user and log the user onto the information handling system when the second electrocardiogram measurement matches the first electrocardiogram measurement, and otherwise: to deny access to the information handling system; to increase a counter; to determine whether the counter has exceeded a threshold; and to request that an input window is displayed when... |
| Pulse detection apparatus, software, and methods using patient physiological signals | 20120302896 | 20121129 |
| The presence of a cardiac pulse in a patient is determined by evaluating physiological signals in the patient. In one embodiment, a medical device evaluates two or more different physiological signals, such as phonocardiogram (PCG) signals, electrocardiogram (ECG) signals, patient impedance signals, piezoelectric signals, and accelerometer signals for features indicative of the presence of a cardiac pulse. Using these features, the medical device determines whether a cardiac pulse is present in the patient. The medical device may also be configured to report whether the patient is in a VF, VT, asystole, or PEA condition, in addition to being in a pulseless condition, and prompt different therapies, such as chest compressions, rescue breathing, defibrillation, and PEA-specific electrotherapy, depending on the analysis of the physiological signals. Auto-capture of... |
| Implantable medical device sensing and selecting wireless ecg and intracardiac electrogram | 20120289847 | 20121115 |
| A CRM system enhances intracardiac electrogram-based arrhythmia detection using a wireless electrocardiogram (ECG), which is a signal sensed with implantable electrodes and approximating a surface ECG. In one embodiment, an intracardiac electrogram allows for detection of an arrhythmia, and the wireless ECG allows for classification of the detected arrhythmia by locating its origin. In another embodiment, the wireless ECG is sensed as a substitute signal for the intracardiac electrogram when the sensing of the intracardiac electrogram becomes unreliable. In another embodiment, a cardiac signal needed for a particular purpose is selected from one or more intracardiac electrograms and one or more wireless ECGs based on a desirable signal quality. In another embodiment, intracardiac electrogram-based arrhythmia detection and wireless ECG-based arrhythmia detection confirm with each other before... |
| Adherent device for sleep disordered breathing | 20120277549 | 20121101 |
| An adherent device is configured to adhere to the skin of the patient with an adherent patch, for example breathable tape, coupled to at least four electrodes. The device comprises impedance circuitry coupled to the at least four electrodes and configured to measure respiration of the patient to detect sleep apnea and/or hypopnea. The impedance circuitry may be used to measure hydration of the patient. An accelerometer can be mechanically coupled to the adherent patch such that the accelerometer can be coupled to and move with the skin of the patient. Electrocardiogram circuitry to generate an electrocardiogram signal may be coupled to at least two of the at least four electrodes to detect the sleep apnea and/or hypopnea.
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| Measurement apparatus, measurement method, information processing apparatus, information processing method, and program | 20120253206 | 20121004 |
| A measurement apparatus includes a signal generation unit generating a measurement signal for measuring a bioelectrical impedance, a first electrode pair making contact with the left and right sides of a body of a person under measurement to supply the measurement signal generated to the body, a second electrode pair placed adjacent to the first electrode pair and making contact with the left and right sides of the body, a bioelectrical impedance measurement unit measuring the bioelectrical impedance of the person under measurement based on an electrical signal obtained from the second electrode pair in response to supplying of the measurement signal, and an electrocardiogram signal measurement unit measuring an electrocardiogram signal of the person under measurement based on the electrical signal obtained from the second... |
| Twa measuring electrocardiograph, twa measuring method, and twa measurement system | 20120253213 | 20121004 |
| A TWA measuring electrocardiograph includes: a transformation coefficient storing section configured to store a transformation coefficient for deriving a Frank's vector electrocardiogram; an electrocardiograph controlling section configured to produce a scalar electrocardiogram from electrocardiographic signals of measurement electrodes adapted to be attached to a subject, and configured to derive the Frank's vector electrocardiogram from the scalar electrocardiogram by using the transformation coefficient; and a TWA measuring section configured to measure a presence of TWA based on the derived Frank's vector electrocardiogram.
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| Electrocardiogram signal sensing module, apparatus and computer to be integrated therewith | 20120245480 | 20120927 |
| An electrocardiogram (ECG) signal sensing module is provide. The ECG signal sensing module includes at least one touchpad button, for producing a press signal when being pressed; at least one sensing electrode, mounted on the at least one touchpad button and moving in unison with the at least one touchpad button, for measuring the voltage on the portion thereof touched by a user; an electrocardiogram signal processor, coupled to the at least one sensing electrode, for processing the voltage on the at least one sensing electrode and producing an ECG signal; and a transmission interface, coupled to the at least one touchpad button and the electrocardiogram signal processor, for outputting the press signal and the ECG signal to a computer.
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| Dynamic radiographic image obtaining method and apparatus | 20110009743 | 20110113 |
| A method and apparatus for obtaining a dynamic radiographic image with enhanced resolution, in which an electrocardiogram of a subject is obtained, and five time phases are allocated to each cardiac beat period (1 second). The initial X-ray irradiation is performed at 1st time phase of 1st beat to obtain a radiographic image. Thereafter, X-ray irradiations are performed sequentially at 2nd time phase of 2nd beat, at 3rd time phase of 3rd beat, at 4th time phase of 4th beat, and at 5th time phase of 5th beat to obtain respective radiographic images. The five radiographic images obtained are combined at the time interval of 0.2 seconds to be displayed as a motion image. The time interval between the irradiations of the X-ray is 1.2 seconds,... |
| Vascular pressure sensor with electrocardiogram electrodes | 20110004075 | 20110106 |
| Devices, systems, and methods for sensing cardiac electrical activity and blood pressure within a blood vessel are disclosed. A vascular sensor includes a fixation element configured to secure the vascular sensor within a blood vessel, a sensor module housing coupled to the fixation element, a pressure sensor disposed within an interior portion of the housing and configured to sense blood pressure within the vessel, and a number of electrocardiogram sensing electrodes exposed to tissue and blood within the blood vessel and configured to sense cardiac electrical data within the blood vessel. A controller module processes the sensed cardiac electrical data and blood pressure data and stores the data within a memory unit and/or transmits the data to a communicating device in wireless communication with the vascular... |
| Low artifact defibrillation electrode | 20100331659 | 20101230 |
| An electrode arrangement for low artifact electrocardiogram (ECG) monitoring and defibrillation, comprises at least one conductor print line body having a large silver conductor print line area functioning as a defibrillation area and a small silver-silver chloride (Ag/AgCl) conductor print line area functioning as a sensing area, at least one non halide defibrillation gel layer and halide containing sensing gel layer configured to attach with the defibrillation area and sensing area respectively, and at least one insulated conductive ink line for connecting the conductor print line body to a cable that provides an electrical communication between the conductor print line body and an external equipment. When direct current runs through the conductor print line body, the large silver conductor print line area polarizes and the small... |
| 12-lead ecg measurement and report editing system | 20100324935 | 20101223 |
| The present invention provides a real-time interactive information system for measurement of 12-lead electrocardiogram waveforms and report editing, comprising a server providing cross-platform web page browsing for user to input commands or to review ECG reports and to edit or to measure information from patient further, a device for supporting internet interacting protocol which is a WEB SERVICE allowing for receiving commands issued by the server of cross-platform web page browsing and giving the server the feedback of processed ECG information by assistance from the database device, and a database device allowing for accessing patient's information to the internet interacting protocol.
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| Method and device for assisting in determination of the suitability of a patient for a scan of the patient's heart using an x-ray computer tomograph and method and x-ray computer tomograph for scanning the heart of a patient | 20100324434 | 20101223 |
| A method is disclosed for assisting in determination of the suitability of a patient for a scan of the heart of the patient using an X-ray computer tomograph. In at least one embodiment of the method, a) an electrocardiogram of the patient is recorded; b) the electrocardiogram is evaluated by predicting the occurrence time of at least the immediately following R wave on the basis of at least four immediately consecutive R waves of the electrocardiogram which were measured last, and comparing this with the actual measured occurrence time of the next R wave; and c) wherein the quality of the prediction is visualized qualitatively. Further, in at least one embodiment, a device is disclosed including an ECG instrument and a computation device for carrying out... |
| X-ray diagnostic system | 20100324413 | 20101223 |
| In one embodiment, an X-ray diagnostic system is provided. The system is provided with an X-ray irradiation section, an X-ray detection section, an image data generation unit, a position detecting unit and a control section. The X-ray irradiation section radiates an X-ray to an object to be diagnosed. The X-ray detection section detects the X-ray radiated from the X-ray irradiation section and transmitted through the object so as to generate X-ray transmission data. The image data generation unit generates image data based on the X-ray transmission data. The position detecting unit detects position of a catheter inserted into the object. The control section switches X-ray irradiation conditions to be irradiated from the X-ray irradiation section, based on positional data detected by the position detecting unit and... |
| System for quantitative assessment of cardiac electrical events | 20100317985 | 20101216 |
| Systems and methods for characterizing aspects of an electrocardiogram signal are presented, wherein primary and secondary analysis schemas are utilized to determine the timing of the end of a signal wave, such as a descending Twave, with precision. In one embodiment, the primary analysis schema involves comparing voltage amplitudes within a given sampling window and the secondary analysis schema involves comparing the results of primary analysis for successive sampling windows. The system may comprise a processor or microcontroller embedded into a system such as an electrocardiogram hardware system, personal computer, electrophysiology system, or the like.
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| Method for quantitative assessment of cardiac electrical events | 20100317983 | 20101216 |
| Systems and methods for characterizing aspects of an electrocardiogram signal are presented, wherein primary and secondary analysis schemas are utilized to determine the timing of the end of a signal wave, such as a descending Twave, with precision. In one embodiment, the primary analysis schema involves comparing voltage amplitudes within a given sampling window and the secondary analysis schema involves comparing the results of primary analysis for successive sampling windows. The system may comprise a processor or microcontroller embedded into a system such as an electrocardiogram hardware system, personal computer, electrophysiology system, or the like.
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| Catheter tip positioning method | 20100317981 | 20101216 |
| A computer-based method for positioning an endovascular device in or near the heart using electrocardiogram (ECG) signals is provided. The computer-based method includes receiving an endovascular ECG signal, associated with an endovascular device, including a plurality of waveforms, each waveform having at least a P-wave component, processing the endovascular ECG signal, over a plurality of predetermined time periods, to calculate a P-wave amplitude and a spectral power for each predetermined time period, determining a maximum P-wave amplitude from the plurality of P-wave amplitudes, and an associated maximum spectral power from the plurality of spectral powers, associating the maximum P-wave amplitude and the maximum spectral power with a predetermined location in or near the heart, calculating a location of the endovascular device, for each predetermined time period,... |
| Magnetic resonance imaging apparatus and image processing apparatus | 20100312098 | 20101209 |
| A magnetic resonance imaging apparatus includes a first data acquisition unit, a second data acquisition unit and an image data generating unit. The first data acquisition unit acquires first data from a slice to be a target after a first delay time from a reference of a first heart rate synchronized with an electrocardiogram. The second data acquisition unit acquires second data from the slice after a second delay time from a reference of a second heart rate which is different from the first heart rate. The image data generating unit generates image data with image reconstruction processing using the first data and the second data.
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| Magnetic resonance imaging apparatus | 20100308823 | 20101209 |
| According to one embodiment, a magnetic resonance imaging apparatus includes an electrocardio information acquisition unit and an image data generation unit. The electrocardio information acquisition unit acquires a magnetic resonance signal for estimating an electrocardiogram signal of an object in sync with a biomedical signal other than an electrocardiogram signal. The biomedical signal is acquired from the object and shows a cardiac beat. The electrocardio information acquisition unit further determines a time difference between a position of a reference wave of the electrocardiogram signal and a synchronous position of the biomedical signal. The position of the reference wave is estimated from the acquired magnetic resonance signal. The image data generation unit acquires a magnetic resonance signal for imaging corresponding to a specific time phase of the... |
| Diagnostic and therapeutic chest casing | 20100305633 | 20101202 |
| A system and method is provided for detection, forewarning, and rapid therapeutic treatment of a patient's ischemic and arrhythmic heart condition, congestive heart failure, respiratory failure, etc. The system comprises a chest casing of a form fitting material. The inner surface of the chest casing comprises electrocardiogram sensor electrodes, auscultation sensors, impedance sensor electrodes, etc. The electrocardiogram sensor electrodes detect abnormal electrocardiogram signals. The auscultation sensors record internal sounds at predefined cardiac and respiratory auscultation sensor points. The impedance sensor electrodes measure thoracic impedance across two or more points on the chest wall. A control unit is connected to the sensors for collecting and processing patient information. The control unit transmits the processed patient information to an external monitoring station. The chest casing comprises therapeutic delivery... |
| Electrocardiograph with extended lead function, and extended lead electrocardiogram deriving method | 20100305461 | 20101202 |
| There are provided an electrocardiograph with an extended lead function and an extended lead ECG deriving method capable of easily deriving an ECG signal of an extended lead ECG by an arithmetic operation, based on ECG signals of a standard 12-lead ECG measured by a potential detector 10. An ECG memory 12 stores the ECG signals measured as the standard 12-lead ECG by the potential detector 10. An extended lead ECG calculator 16 calculates extended lead ECGs V7-V9 from the ECG signals stored in the ECG memory 12, using coefficients α representing a relationship among leads. The extended lead ECGs V7-V9 calculated are displayed through an extended lead ECG waveform outputting device 18 on a display monitor 20.
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| Pulse detection method and apparatus using patient impedance | 20100292748 | 20101118 |
| The presence of a cardiac pulse in a patient is determined by evaluating fluctuations in an electrical signal that represents a measurement of the patient's transthoracic impedance. Impedance signal data obtained from the patient is analyzed for a feature indicative of the presence of a cardiac pulse. Whether a cardiac pulse is present in the patient is determined based on the feature in the impedance signal data. Electrocardiogram (ECG) data may also be obtained in time coordination with the impedance signal data. Various applications for the pulse detection of the invention include detection of PEA and prompting PEA-specific therapy, prompting defibrillation therapy and/or CPR, and prompting rescue breathing depending on detection of respiration.
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| Implantable p-wave dispersion detector | 20100286540 | 20101111 |
| an evaluation unit, which is connected to the averaging unit and designed to determine the duration of an averaged P-wave in the particular averaged P-wave signal.
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| Method and system of auditory evoked heart rate variability analysis | 20100268104 | 20101021 |
| The present invention provides a method and system of auditory evoked heart rate variability analysis having advantage of simply analytical process and portability. The disclosed method mainly includes the following steps of: stimulating the auditory system of a person by a sound through a sound transmission device, capturing an electrocardiogram signal of the person, performing analog-to-digital conversion of the electrocardiogram signal, selecting the peaks of the electrocardiogram signal and transforming the qualified peaks to a consecutive peak signal, and performing spectrum analysis to the peak signal in frequency domain, and obtaining the difference of the spectral parameters before and after the evoked sounds. Moreover, the sound further is selected from the group consisting of noise, short tone burst, click, and any other sound with the intensity... |
| Method and system to measure ecg and respiration | 20100268093 | 20101021 |
| A method for monitoring the respiration rate of a patient includes attaching a plurality of electrocardiogram (ECG) electrodes and a pressure sensor to a patient, producing a first respiration signal based on variations detected in signals provided by the ECG electrodes attached to the patient, and producing a second respiration signal based on pressure variations detected in the pressure sensor secured to the patient. The method also includes selecting at least one of the first respiration signal and the second respiration signal based on respective signal qualities and producing a respiration rate from the selected signal. The method also includes providing indicia of the respiration rate. The method may also include displaying ECG signals with the indicia of the respiration rate.
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| Method for non-contrast enhanced magnetic resonance angiography | 20100268062 | 20101021 |
| A method for non-contrast enhanced magnetic resonance angiography (“MRA”) that has a short scan time and is insensitive to patient motion is provided. More particularly, the method provides significant arterial conspicuity and substantial venous signal suppression. A two-dimensional single shot acquisition is employed and timed to occur a specific time period after the occurrence of an R-wave in a contemporaneously recorded electrocardiogram. In this manner, k-space data is acquired that is substantially insensitive to variations in arterial flow velocity, or heart rate, and that further substantially suppresses unwanted venous signal in a prescribed imaging slice.
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| Systems and methods for managing medical data | 20100262429 | 20101014 |
| Managing electrocardiogram (ECG) processing is described. ECGs are distributed to a technician system and/or a cardiologist system based on protocol data and one or more factors to promote processing efficiency for the ECGs. A modification to the protocol data can be received. Processed ECGs can be analyzed in view of the modification to identify ECGs for reprocessing. The identified ECGs can be reprocessed in accordance with the modification to the protocol data and, if applicable, the factors.
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| Reconstruction of a surface electrocardiogram from far field signals extracted of an endocardial electrogram | 20100256699 | 20101007 |
| Reconstruction of a surface electrocardiogram from far field signals extracted from an endocardial electrogram in an active medical device is disclosed. The device collects a ventricular EGM signal (EGMV) and an atrial EGM signal (EGMA), and extracts a ventricular far field signal component (FFV) and an atrial far field signal component (FFA). The ventricular and atrial far field signal components are combined to deliver as an output a reconstructed surface electrogram ECG signal (ECGj*). The ventricular and atrial far field signals are respectively extracted from the collected ventricular and atrial EGM signals (FFV, FFA). The reconstruction of the ECG is operated by ventricular (18) and atrial (16) far field signal estimator filters. According to one embodiment, the far field signal estimator filters are linear or nonlinear... |
| Reconstruction of a surface electrocardiogram from an endocardial electrogram using non-linear filtering | 20100256511 | 20101007 |
| The present invention relates to an active medical device that uses non-linear filtering for reconstructing a surface electrocardiogram from an endocardial electrogram. At least one endocardial EGM electrogram signal is collected from of samples collected from at least one endocardial or epicardial derivation (71′, 72′, 73′), and at least one of a reconstructed surface electrocardiogram (ECG) signal through the processing of collected EGM samples by a transfer function (TF) of a neural network (60′). The neural network (60′) is a time-delay-type network that simultaneously processes said at least one endocardial EGM electrogram signal, formed by a first sequence of collected samples, and at least one delayed version of this EGM signal, formed by a second sequence of collected samples distinct from the first sequence collected samples.... |
| stick shaped analytical apparatus of heart rate variability | 20100256509 | 20101007 |
| The present invention provides a stick shaped analytical apparatus of heart rate variability having a view to simplifying the analytical process and carrying out automation. The stick shaped analytical apparatus of heart rate variability mainly includes a plurality of electrodes; an electrocardiogram collector; a heart rate variability chip and a transmission interface. It is noted that the heart rate variability chip further comprises: a feature extraction unit and a decision making unit. In practice, the stick shaped analytical apparatus of heart rate variability put forth in the present invention is quite time-saving and easy to use, as it prints out a person heart rate variability analytical result and autonomic function data in just five minutes after a plurality of electrodes are pressed simultaneously.
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| Non-linear filtering for the reconstruction of a surface electrocardiogram from an endocardial electrogram | 20100249623 | 20100930 |
| An active medical device using non-linear filtering for the reconstruction of a surface electrocardiogram (ECG) from an endocardial electrogram (EGM) is disclosed. The device for the reconstruction of the surface ECG comprises: a plurality of inputs, receiving a corresponding plurality of EGM signals from endocardial or epicardial electrogram (x1[n], x2[n]) each collected on a respective EGM derivation of a plurality of EGM derivations, and at least one output delivering a reconstructed surface ECG electrocardiogram signal (y[n]), related to an ECG derivation, and a non-linear digital filter (12′, 12′, 14) with a transfer function that determines the reconstructed ECG signal based on said plurality of input EGM signals. The non-linear digital filter includes a Volterra filter type (12, 12′, 12″) whose transfer function includes a linear term... |
| Optimization of pacemaker settings | 20100228311 | 20100909 |
| The system provides information to facilitate efficient optimization of programmer settings for cardiac pacemakers. It uses simultaneous measurement of a patient's electrocardiogram and peripheral blood pressure waveform in order to calculate, in real-time, a value correlated to the patient's pre-ejection time (PET) and, optionally, ejection duration (ED) for the patient's left ventricle. The peripheral blood pressure waveform is preferably monitored with a wrist mounted tonometer. Data including the electrocardiogram and peripheral blood pressure trace, as well as the surrogate pre-ejection time interval (SPET) for each heart beat and trending is displayed on a computer monitor, thereby allowing a physician or nurse to quickly optimize PET for the patient and adjusting programmer settings for an implanted pacemaker.
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| Differentiating ischemic from non-ischemic t-wave inversion | 20100222690 | 20100902 |
| A method of discriminating between ischemic and cardiac memory effects in a heart, comprising receiving electrocardiographic (ECG) data, calculating, from the ECG data, a direction of a T-wave vector, diagnosing ischemia if the T-wave vector is between about 75 degrees and about 200 degrees, and diagnosing cardiac memory if the T-wave vector is between about zero degrees and minus 90 degrees. Also presented is a system for discriminating between ischemic and cardiac memory effects in a heart comprising means for performing an electrocardiogram, means for calculating a direction of a T-wave vector, means for diagnosing ischemia if the T-wave vector is between about 90 degrees and 180 degrees, and means for diagnosing cardiac memory if the T-wave vector is between about zero degrees and minus 90... |
| Technique for determining signal quality in a physiologic sensing system using high frequency sampling | 20100217143 | 20100826 |
| A medical device for processing physiological signals such as electrocardiograms. The processing includes: sampling a physiologic signal in a first channel with a first sampling rate, simultaneously sampling the physiologic signal in a second channel with a higher sampling rate to thus generate pairs of sampling values, forming the difference between two sampling values of each pair, comparing said difference with a threshold, and generating a noise detection indicator whenever said threshold is exceeded.
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| Electrocardiogram derived apnoea/hypopnea index | 20100217133 | 20100826 |
| The present invention provides a method and apparatus for determining the occurrence of apnoeas or hypopneas from ECG signal data alone. The method is carried out by apparatus configured to acquire ECG signals from a sleeping subject, transform the signals to data, and extract ECG features relevant to estimate breathing effort for the determination of respiratory events characteristic of apnoeas and hypopneas. The extracted ECG features are correlates of breathing efforts and are used as surrogate measures of breathing or respiratory events. The method may include calculating an AHI or apnoea/hypopnea index. The method may classify apnoeas into obstructive or central apnoeas.
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| Systems and methods for graphic display of st-segment deviation | 20100210961 | 20100819 |
| Systems and methods are provided for monitoring a patient and graphically representing ST-segment deviations. A receiver acquires, from a plurality of leads, electrocardiogram (ECG) signals that each includes an ST-segment. A processor processes the ECG signals to determine baseline and current ST-segment deviations relative to an isoelectric value. A display module displays a graph that includes a first axis representing ST-segment deviation values and a second axis representing the plurality of leads. At each location along the second axis representing a respective lead, the graph displays a first set of graphic indicia representing the baseline ST-segment deviations and a second set of graphic indicia representing the current ST-segment deviations. In certain embodiments, the graphic indicia are represented by bar graphs. In other embodiments, the graphic indicia... |
| Portable electrocardiograph set | 20100210959 | 20100819 |
| A portable electrocardiograph set includes an electrocardiograph body provided with an electrocardiogram monitoring circuit, a lead part having two or more cables with respective clips for connecting external electrodes to the electrocardiogram monitoring circuit, and a containing member for containing and carrying the electrocardiograph body and the lead part. The clip fixing member is configured to enable all of the clips of the two or more cables simultaneously fixed thereto. The clip fixing member may be provided attached or not attached to the containing member, the lead part or the electrocardiograph body.
... |
| Scale-type nonconstrained health condition evaluating apparatus and method | 20100210921 | 20100819 |
| A scale-type nonconstrained health condition evaluating apparatus includes a load cell sensor for sensing a ballistocardiogram signal and a weight signal from a measured person, an electrocardiogram sensor for sensing an electrocardiogram signal from the measured person, and a signal processor for calculating at least one of the heart rate, normalized stroke volume force, blood pressure and equilibrium sense abnormality of the measured person from the ballistocardiogram, weight and electrocardiogram signals sensed by the load cell sensor and the electrocardiogram sensor.
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| Audience response measurement and tracking system | 20090328089 | 20091231 |
| A system performs audience response measurement and tracking using neuro-response data such as central nervous system, autonomic nervous system, and effector data. Subjects are exposed to stimulus material such as marketing and entertainment materials and data is collected using mechanisms such as Electroencephalography (EEG), Galvanic Skin Response (GSR), Electrocardiograms (EKG), Electrooculography (EOG), eye tracking, and facial emotion encoding. Data collected is analyzed to measure and track audience response to the stimulus materials.
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| Neuro-physiology and neuro-behavioral based stimulus targeting system | 20090327068 | 20091231 |
| A system performs stimulus targeting using neuro-physiological and neuro-behavioral data. Subjects are exposed to stimulus material such as marketing and entertainment materials and data is collected using mechanisms such as Electroencephalography (EEG), Galvanic Skin Response (GSR), Electrocardiograms (EKG), Electrooculography (EOG), eye tracking, and facial emotion encoding. Neuro-physiological and neuro-behavioral data collected is analyzed to select targeted stimulus materials. The targeted stimulus materials are provided to particular subjects for a variety of purposes.
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| Method and system for dynamical systems modeling of electrocardiogram data | 20090326401 | 20091231 |
| Electrocardiogram data is received in association with a subject, the electrocardiogram data comprising a series of RR intervals and a series of QT intervals. A first value which indicates an amount by which uncertainty associated with the QT intervals is reduced given the RR intervals is generated. A second value which indicates an amount by which uncertainty associated with the RR intervals is reduced given the QT intervals is generated. The subject is determined to be associated with a low risk of cardiac dysfunction responsive to the first value exceeding the second value and a result of the determination is provided.
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| Electrocardiogram and respiration monitoring in animals | 20090326387 | 20091231 |
| An ambulatory animal monitoring system includes a wearable structure constructed to be worn about a body of a non-human animal to be monitored. The system includes a plurality of electrical signal conduits each associated with the wearable structure and each connectable to a different one of a plurality of surface electrode components. The system includes processing and control device adapted to be worn with the wearable structure, the processing and control device comprising a) an ECG monitoring component and b) an impedance level monitoring component that generates data indicative of electrical impedance levels of the animal over time.
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| Ecg analyzing device | 20090292218 | 20091126 |
| A device (10) for processing electrocardiogram signals and marker signals includes an input interface (30) for receiving electrocardiogram signals and marker signals detected by an implantable medical device; an analyzer unit (32) connected to the input interface (30) for processing the electrocardiogram signals and marker signals, and an output interface (34) connected to the analyzer unit (32) for output of data representing an analytical report to a playback unit. The analyzer unit (32) is designed to analyze electrocardiogram signals and marker signals in combination, such that the analyzer unit (32) detects relevant particular features on the basis of predefined criteria; assigns a priority to a detected particular feature; and generates an analytical report containing at least a listing of the detected particular features.
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| Electrocardiographic (ecg) data analysis systems and methods | 20090275850 | 20091105 |
| Computer-implemented methods, computer program products, and systems are disclosed for analyzing electrocardiogram (ECG) traces or other types of signals. In one aspect, a computer-implemented method of performing such an analysis on an ECG trace includes defining a match region within an ECG signal template comprising one cardiac cycle. The match region comprises a portion of the ECG signal template that is shorter than the entire template. The method also includes performing a similarity comparison analysis on an ECG trace. The similarity comparison analysis includes, for at least one cardiac cycle within the ECG trace, a comparison of the defined match region to a corresponding region of the cardiac cycle of the ECG trace to determine a degree of similarity between the defined match region and the... |
| Electrocardiographic (ecg) data analysis systems and methods | 20090275850 | 20091105 |
| Computer-implemented methods, computer program products, and systems are disclosed for analyzing electrocardiogram (ECG) traces or other types of signals. In one aspect, a computer-implemented method of performing such an analysis on an ECG trace includes defining a match region within an ECG signal template comprising one cardiac cycle. The match region comprises a portion of the ECG signal template that is shorter than the entire template. The method also includes performing a similarity comparison analysis on an ECG trace. The similarity comparison analysis includes, for at least one cardiac cycle within the ECG trace, a comparison of the defined match region to a corresponding region of the cardiac cycle of the ECG trace to determine a degree of similarity between the defined match region and the... |
| Systems and methods for improved atrial fibrillation (af) monitoring | 20090264783 | 20091022 |
| Methods and systems described herein are especially useful wherein monitoring for atrial fibrillation (AF) is based on RR interval variability as measured from an electrocardiogram (ECG) signal. An activity threshold, which can be patient specific, is obtained. Patient activity is monitored. Based on the monitored patient activity and the activity threshold, there is a determination of when it is likely that AF monitoring based on RR interval variability is adversely affected by patient activity. When it has been determined that it is likely that AF monitoring based on RR interval variability is adversely affected by patient activity, whether and/or how AF monitoring is performed is modified.
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| Cardiac stimulator with stimulation success monitoring | 20090264945 | 20091022 |
| An implantable cardiac stimulator having an at least partially electrically conductive housing, a ventricular stimulation unit connectable to left ventricular or right ventricular stimulation electrode and designed to generate ventricular stimulation pulses for stimulation of heart ventricle, having terminal for right ventricular defibrillation electrode. Has far-field electrogram detection unit (FFEDU) and stimulation success detecting unit (SSDU), of which FFEDU has first input connected to the terminal for right ventricular defibrillation electrode and second input connected to housing. FFEDU detects far-field electrocardiogram based on electric potentials applied to inputs and deliver these potentials to SSDU. SSDU has electrogram input and signal input receives a far-field electrogram generated by FFEDU and receives stimulation signal that represents a ventricular stimulation pulse generated and delivered by ventricular stimulation unit and... |
| Ventricular heart stimulator | 20090264946 | 20091022 |
| The invention relates to an implantable ventricular heart stimulator (10), comprising an at least partially electrically conductive housing (12), an electrode line terminal for connection of a ventricular defibrillation electrode line (20) and a terminal for a defibrillation electrode (26). According to the invention, the heart stimulator has a far-field electrocardiogram detection unit (70) which has a first input connected to the terminal for the ventricular defibrillation electrode and has a second input connected to the electrically conductive housing and designed or configured to generate a far-field electrocardiogram on the basis of the electric potentials applied to the two inputs during operation. The inventive heart stimulator also has a far-field electrocardiogram evaluation unit (72) which is connected to the far-field electrocardiogram detection unit and is designed... |
| Method of locating the tip of a central venous catheter | 20090259124 | 20091015 |
| Methods of locating a tip of a central venous catheter (“CVC”) relative to the superior vena cava, sino-atrial node, right atrium, and/or right ventricle using electrocardiogram data. The CVC includes at least one electrode. In particular embodiments, the CVC includes two or three pairs of electrodes. Further, depending upon the embodiment implemented, one or more electrodes may be attached to the patient's skin. The voltage across the electrodes is used to generate a P wave. A reference deflection value is determined for the P wave detected when the tip is within the proximal superior vena cava. Then, the tip is advanced and a new deflection value determined. A ratio of the new and reference deflection values is used to determine a tip location. The ratio may... |
| Fetal ecg monitoring | 20090259133 | 20091015 |
| A method for fetal monitoring includes acquiring electrical signals from a set of electrodes, for example, a set of surface electrodes applied to a maternal abdominal region. The electrical signals are analyzed, including by performing a morphological analysis of fetal electrocardiogram signals. A clinical indicator is then determined from a result of performing the morphological analysis.
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| Fluorescence polarization herg assay | 20090253148 | 20091008 |
| Disclosed are assays, methods, and kits for the screening of test compounds for their capability to induce cardiotoxicity in a subject. In particular, whether a test compound has the effect to prolong the Q-T interval as measured by an electrocardiogram in a human. The assays, methods, and kits disclosed herein make use of the binding interaction between novel fluorescent tracers and the hERG K+ channel, and the propensity of a test compound to influence that binding interaction.
... |
| Fluorescence polarization herg assay | 20090253148 | 20091008 |
| Disclosed are assays, methods, and kits for the screening of test compounds for their capability to induce cardiotoxicity in a subject. In particular, whether a test compound has the effect to prolong the Q-T interval as measured by an electrocardiogram in a human. The assays, methods, and kits disclosed herein make use of the binding interaction between novel fluorescent tracers and the hERG K+ channel, and the propensity of a test compound to influence that binding interaction.
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| System and method for generating a patient diagnosis | 20090247872 | 20091001 |
| A system for generating a diagnosis is disclosed herein. The system includes a controller, an electrocardiograph connected to the controller, and an ultrasound device connected to the controller. The electrocardiograph is configured to generate a diagnostic electrocardiogram. The controller is configured to generate a diagnosis based on data from the electrocardiograph or the ultrasound device.
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| Apparatus for magnetically deployable catheter with mosfet sensor and method for mapping and ablation | 20090248014 | 20091001 |
| A mapping and ablation catheter is described. In one embodiment, the catheter includes a MOSFET sensor array that provides better fidelity of the signal measurements as well as data collection and reduces the error generated by spatial distribution of the isotropic and anisotropic wavefronts. In one embodiment, the system maps the change in potential in the vicinity of an activation wavefront. In one embodiment, the mapping system tracks the spread of excitation in the heart, with properties such as propagation velocity changes. In one embodiment, during measurement, the manifold carrying the sensor array expands from a closed position state to a deployable open state. Spatial variation of the electrical potential is captured by the system's ability to occupy the same three-dimensional coordinate set for repeated measurements... |
| Device, method and computer-readable storage medium for enhanced sense event classification in implantable devices by means of morphology analysis | 20090240157 | 20090924 |
| An implantable cardiac device, e.g., a pacemaker, defibrillator, cardioverter or biventricular pacing device, that can sense cardiac electrical signals and accurately classify the sensed events. The device provides a template signal and a test signal originated from an electrogram. The device further transforms at least the test signal into a representation of the test signal for example in numerical format where the sample values of the test signal take the form of integers. The device further determines a correlation between the template and test signals, and classifies the sense events based on the correlation. The electrogram may be an intracardiac electrogram (IEGM), atrial electrogram (AEGM), ventricular electrogram (VEGM), surface electrocardiogram (ECG) or subcutaneous electrogram.
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| Method of evaluating effect of prolonging qt interval in electrocardiogram | 20090234238 | 20090917 |
| A method for evaluating electrocardiogram QT interval-prolonging action of a test substance, which comprises preparing a hamster anesthetized under such a condition that end of T wave is definitely observed on an electrocardiogram, and comparing electrocardiogram QT intervals of the hamster observed before and after administration of the test substance to evaluate electrocardiogram QT interval-prolonging action of the test substance.
... |
| Analysis of electrocardiogram signals | 20090234239 | 20090917 |
| Apparatus for graphical representation of a train of ECG complexes, said ECG complexes comprising an R wave and a T-P interval and having variable isoelectric levels, the apparatus comprising: an isoelectric alignment unit for aligning the complexes in terms of isoelectric level by aligning respective T-P intervals, thereby to provide a graphical representation of said train of ECG complexes; and a temporal alignment unit for aligning said complexes temporally using a predetermined point of respective R waves. The aligned units are superimposed to provide a distribution of a normalized ECG signal over a series of pulses or heartbeats.
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| Heart failure decompensation prediction based on cardiac rhythm | 20090234410 | 20090917 |
| Systems and methods of detecting an impending cardiac decompensation of a patient measure an electrocardiogram signal of the patient. An incidence of cardiac arrhythmias is determined from the electrocardiogram signal. A risk of impending decompensation is determined in response to the incidence of cardiac arrhythmias. In many embodiments, the impending decompensation can be detected early enough to avoid, or at least delay, the impending decompensation, such that patient trauma and/or expensive ICU care can be avoided. Although embodiments make specific reference to monitoring electrocardiogram and other physiological signals with an adherent patch, the system methods and devices are applicable to many applications in which physiological monitoring is used, for example wireless physiological monitoring with implanted sensors for extended periods.
... |
| Method of evaluating effect of prolonging qt interval in electrocardiogram | 20090234238 | 20090917 |
| A method for evaluating electrocardiogram QT interval-prolonging action of a test substance, which comprises preparing a hamster anesthetized under such a condition that end of T wave is definitely observed on an electrocardiogram, and comparing electrocardiogram QT intervals of the hamster observed before and after administration of the test substance to evaluate electrocardiogram QT interval-prolonging action of the test substance.
... |
| Analysis of electrocardiogram signals | 20090234239 | 20090917 |
| Apparatus for graphical representation of a train of ECG complexes, said ECG complexes comprising an R wave and a T-P interval and having variable isoelectric levels, the apparatus comprising: an isoelectric alignment unit for aligning the complexes in terms of isoelectric level by aligning respective T-P intervals, thereby to provide a graphical representation of said train of ECG complexes; and a temporal alignment unit for aligning said complexes temporally using a predetermined point of respective R waves. The aligned units are superimposed to provide a distribution of a normalized ECG signal over a series of pulses or heartbeats.
... |
| Heart failure decompensation prediction based on cardiac rhythm | 20090234410 | 20090917 |
| Systems and methods of detecting an impending cardiac decompensation of a patient measure an electrocardiogram signal of the patient. An incidence of cardiac arrhythmias is determined from the electrocardiogram signal. A risk of impending decompensation is determined in response to the incidence of cardiac arrhythmias. In many embodiments, the impending decompensation can be detected early enough to avoid, or at least delay, the impending decompensation, such that patient trauma and/or expensive ICU care can be avoided. Although embodiments make specific reference to monitoring electrocardiogram and other physiological signals with an adherent patch, the system methods and devices are applicable to many applications in which physiological monitoring is used, for example wireless physiological monitoring with implanted sensors for extended periods.
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| Electrocardiogram sensor | 20090227856 | 20090910 |
| A garment comprising at least one electrocardiogram sensor integrated into the garment, the electrocardiogram sensor comprising an electrode on the inside of the garment and arranged to contact a user's skin, and a resilient compressible filler provided between the garment and the electrode such that in use the electrode is held substantially in place against the user's skin when the garment moves relative to the user's skin.
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| Selectively routing patient data between field devices and treatment center destinations | 20090222539 | 20090903 |
| Techniques for routing event data from a field device, such as an external defibrillator, to a selected subset of a plurality of possible destinations are described. The event data may include physiological data of the patient, such as a 12-lead electrocardiogram (ECG). The destinations may be associated with one of a plurality of patient treatment centers, and may include, as examples, computing device, printers, displays, personal digital assistants, or web-accessible accounts. In some examples, a server maintains user-configurable information or rules for at least some of the destinations, and uses the information or rules for determining whether event data received from a field device is routed to the destination. In some examples, the server may also make the routing determination based on an analysis of event... |
| Apparatus for measuring, recording and transmitting electrocardiogram measurements | 20090216142 | 20090827 |
| Embodiments of the present invention include a monitoring device and method for measuring, recording and transmitting a pre-determined set of electrocardiogram measurements. The device provides for an unassisted six or twelve channel measurements of heart and vascular functions using a visual graphical output. Results of the measurements are charted and can be reviewed and analyzed by an authorized health care provider.
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| Hopping methods for the detection of qrs onset and offset | 20090216144 | 20090827 |
| Disclosed are systems and methods for detecting the QRS portion of an electrocardiogram and also for detect QRS onset/offset points. QRS complexes are identified by testing selected waveform samples to determine if they are in a high curvature region. If a region passes the high curvature test, a verification test is applied to adjacent samples to confirm that the region is within a QRS complex. The search for a QRS onset point begins at an adaptive distance from this region. The curvature of selected regions ahead in the search direction is examined. The search moves past all such high curvature regions. The onset point is then located by searching for a region that is “flat” in either of two senses. First, a region may be locally... |
| Apparatus for measuring, recording and transmitting electrocardiogram measurements | 20090216142 | 20090827 |
| Embodiments of the present invention include a monitoring device and method for measuring, recording and transmitting a pre-determined set of electrocardiogram measurements. The device provides for an unassisted six or twelve channel measurements of heart and vascular functions using a visual graphical output. Results of the measurements are charted and can be reviewed and analyzed by an authorized health care provider.
... |
| Hopping methods for the detection of qrs onset and offset | 20090216144 | 20090827 |
| Disclosed are systems and methods for detecting the QRS portion of an electrocardiogram and also for detect QRS onset/offset points. QRS complexes are identified by testing selected waveform samples to determine if they are in a high curvature region. If a region passes the high curvature test, a verification test is applied to adjacent samples to confirm that the region is within a QRS complex. The search for a QRS onset point begins at an adaptive distance from this region. The curvature of selected regions ahead in the search direction is examined. The search moves past all such high curvature regions. The onset point is then located by searching for a region that is “flat” in either of two senses. First, a region may be locally... |
| Apparatus for measuring, recording and transmitting electrocardiogram measurements | 20090216142 | 20090827 |
| Embodiments of the present invention include a monitoring device and method for measuring, recording and transmitting a pre-determined set of electrocardiogram measurements. The device provides for an unassisted six or twelve channel measurements of heart and vascular functions using a visual graphical output. Results of the measurements are charted and can be reviewed and analyzed by an authorized health care provider.
... |
| System, software, and method for detection of sleep-disordered breathing using an eltrocardiogram | 20080319326 | 20081225 |
| A system to form and store an electrocardiogram (ECG) signal derived from a cardiac electrical signal that includes an apparatus having a pair of the electrodes to connect to a patient to detect the cardiac electrical signal. A signal sampler samples the cardiac electrical signal to form the ECG signal. A data storage device stores the ECG signal. A computer communicates with the data storage device to retrieve the ECG signal for analysis by software stored in the memory of the computer. The software analyzes a morphology of the amplitude of a plurality of R-wave peaks contained within the ECG signal and/or analyzes a morphology of the area of a plurality of QRS complex pulses contained within the ECG signal.
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| Detection of drastic blood pressure changes | 20080319332 | 20081225 |
| The invention relates to cardiac-activity based prediction of a rapid drop in a patient's blood pressure during extracorporeal blood treatment. A proposed alarm apparatus (100) includes a primary beat morphology analysis unit (120), a bank of secondary analysis units (B2) and an alarm generating unit (158). The primary beat morphology analysis unit (120) discriminates heart beats in a received basic electrocardiogram signal (HECG), classifies each beat into one out of at least two different beat categories, and associates each segment of the signal (HECG) with relevant event-type data. The event-type data and the basic electrocardiogram signal (HECG) together form an enhanced electrocardiogram signal (ECGCL), based upon which the primary beat morphology analysis unit (120) determines whether one or more secondary signal analyses should be performed. Depending... |
| System and method for providing cardiovascular disorder diagnosis services | 20080312515 | 20081218 |
| System and method provide an on-line high-performance diagnosis service for cardiovascular disorders. A client requests a high-performance diagnosis by transmitting real electrocardiographic treatment data and magnetocardiographic treatment data of a human body being a treatment object and virtual heart simulation parameters to a medical service server. The medical service server, in response to the diagnosis request, analyzes the real electrocardiographic treatment data to generate an electrocardiographic analysis result, and performs a virtual heart simulation using the simulation parameters to generate a pseudo electrocardiogram and magnetocardiogram. Further, the medical service server determines a disease state of the human body on the basis of the electrocardiographic analysis result, the magnetocardiographic treatment data and the pseudo electrocardiogram and magnetocardiogram, and generates definitive diagnosis data through comparison among the real... |
| Collecting activity data for evaluation of patient incontinence | 20080300470 | 20081204 |
| Systems and methods for determining whether an involuntary voiding event was attributable to stress or urge incontinence include determining an activity level of a patient that coincides with the occurrence of the involuntary voiding event or the activity level within a certain time range of the involuntary voiding event. Patient activity data may be collected via a signal that varies as a function of patient activity. The signal may be generated with one or more sensors that detect motion, such as an accelerometer or a piezoelectric crystal, and/or one or more sensors that monitor a physiological parameter of the patient that varies as a function of patient activity, such as heart rate, respiratory rate, electrocardiogram morphology, respiration rate, respiratory volume, core temperature, muscular activity level or... |
| Method for delineation of characteristic points in an electrocardiogram signal, and storage medium, electronic device and electrocardiogram signal analyzing system for implementing the method | 20080300496 | 20081204 |
| A method for delineation of characteristic points in an electrocardiogram signal includes the steps of: (a) processing the electrocardiogram signal to obtain at least one multiscale differential operator wavelet transform thereof; and (b) locating at least one characteristic point in at least one wave segment of the electrocardiogram signal based on the at least one multiscale differential operator wavelet transform.
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| Garment accessory with electrocardiogram sensors | 20080287769 | 20081120 |
| A garment accessory includes a member having first and second ends, with the length of the member between the first and second ends being less than the circumference of a subject that the member is configured for and a pair of fastener mechanisms disposed in proximity to the first and second ends of the member, the fastener mechanisms configured to attach the member to an article of clothing worn by a subject. The garment accessory also includes at least a pair of sensors supported by the member with the sensors being at least one of ECG sensors, motion sensors, body temperature sensors and impedance plethysmography sensors.
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| System and method for selecting end of diastole and end of systole frames | 20080281218 | 20081113 |
| A method and apparatus for automatically selecting an end of diastole image frame and an end of systole image frame for cardiac analysis. In the method and apparatus, a plurality of image frames of a heart having a contrast medium injected into the heart and an electrocardiogram (ECG) curve of the heart are obtained. Candidate image frames are identified in the plurality of image frames that correspond to a first predetermined point on the ECG curve of the heart associated with the end of diastole. An end of diastole image frame is selected from the candidate image frames. An end of systole image frame is then identified and selected from the remaining one of the plurality of image frames.
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| Coherent signal rejection in ecg | 20080275353 | 20081106 |
| A method for monitoring an electrocardiogram (ECG) signal of a subject, includes digitally sampling an average signal from at least a first ECG electrode, determining an average interference frequency, and digitally sampling and buffering a raw ECG signal from at least a second ECG electrode. The method further includes: filtering the raw ECG signal to generate a residual signal; calculating, based on the residual signal, a first amplitude and a first phase shift of a primary interference signal at the average interference frequency and a second amplitude and a second phase shift of one or more harmonic interference signals at respective multiples of the average interference frequency; and digitally subtracting the primary interference signal and the one or more harmonic interference signals from the raw ECG... |
| Qt-interval measurement in the electrocardiogram | 20080262366 | 20081023 |
| A method and apparatus for measuring the QT interval of an electrocardiogram (ECG) signal is provided wherein the end of the T wave is identified from ECG data. The end of the T wave is defined as the first time of intersection at which an upright T wave of a first set of derived ECG signal data intersects an inverted T wave of a second set of derived ECG signal data. The intersection of the two sets of ECG data is along an isoelectric line within the trough after the positive T wave peak when the superimposed isoelectric baselines from the upright and inverted ECG signals demonstrate the best least squares fit.
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| Method for delivering subjective surveys linked to subjective and objective data | 20080262872 | 20081023 |
| A patient interaction apparatus 10 includes a medical server 13 that generates a reflexive survey as a result of items of interest (such as abnormal or unexpected vital signs) in objective or subjective data reported from a patient interface device 11. The survey of the present invention reacts to objective results with the intent of probing into the patient's current condition. The patient survey of the present invention specifically probes why a patient's weight, blood pressure, or pulse rate, to name only a few examples, may be higher than expected. Various methods for determining the trigger conditions and the elimination of erroneously reported vital signs are set forth. The patient's objective or subjective data includes one or more of the following: blood pressure, pulse rate, temperature,... |
| Blood pressure monitoring apparatus and method | 20080249382 | 20081009 |
| The blood pressure monitoring apparatus and method are disclosed that can monitor a blood pressure of a subject using an electrocardiogram signal, a pulse wave signal and a body characteristic information of the subject, wherein the electrocardiogram signal and the pulse wave signal of the subject are monitored to remove a noise signal generated from monitoring of the pulse wave signal, allowing monitoring a precise blood pressure of the subject, and calculating the pulse wave analysis information using the monitored pulse wave signal, and using the electrocardiogram signal and the pulse wave signal to calculate a pulse transit time (PPT), and plugging a calculated pulse wave propagation time, pulse wave analysis information and body characteristic information of the subject into a predetermined regression equation to monitor... |
| Method of detection and compensation for respiratory motion in radiography cardiac images synchronized with an electrocardiogram signal | 20080240536 | 20081002 |
| A method of detection and compensation for respiratory motion improves the registration between a 3D pre-operation image and X-ray images acquired during a cardiac intervention. By synchronizing the X-ray images with the electrocardiogram, the disclosed method thus eliminates the motion related to the heart cycle from these images, thus isolating the contribution of the respiratory motion. From this point, an algorithm is proposed capable of attributing the motion remaining in the radiography images to respiration. The algorithm also enables this motion to be detected and compensated for in order to obtain a registration between 3D cardiac images and radiography images.
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| Method of compressing electrocardiogram data and electrocardiogram telemetry system using the same | 20080243012 | 20081002 |
| In an electrocardiogram telemeter, a data acquirer is operable to acquire electrocardiogram data. A data compressor is operable to compress the electrocardiogram data with either a wavelet transform, a Huffman coding, or an arithmetic coding, thereby generating compressed electrocardiogram data adapted to be transmitted to a remote receiver which is configured to reconstruct the electrocardiogram data.
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| Method and apparatus for generating an electrocardiogram | 20080234592 | 20080925 |
| (ii) the processor (3) detecting an ECG signal formed between the first and second input terminals (4a,4b), wherein the ECG signal is indicative of the health status of the user's heart.
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| Brain wave measuring method, apparatus and computer readable recording medium implemented with program for executing the method | 20080234596 | 20080925 |
| A method for measuring a brain wave comprises extracting positive and negative peaks from an electrocardiogram (EKG) signal reflecting heartbeat information, and positive peaks from an electroencephalogram (EEG) signal reflecting heartbeat-caused noise information and brain wave information. The positive peaks of the EEG signal are classified into a first peak group and a second peak group based on the positive peaks of the EKG signal. The first peak group is affected more greatly by the heartbeat than by the brain wave, and the second peak group is affected more greatly by the brain wave than by the heartbeat. Noise of the first and second peak groups is removed from the EEG signal.
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| method and apparatus for cufflessly and non-invasively measuring wrist blood pressure in association with communication device | 20080228089 | 20080918 |
| A method of cufflessly and non-invasively measuring blood pressure in a wrist region of a patient in association with a communication device that relays the information being measured includes: detecting a magnitude difference between a plurality of pulse wave signals detected from a wrist of a user; detecting feature points from an electrocardiogram (ECG) and pulse wave signals detected from the user; extracting variables needed to calculate the highest blood pressure and the lowest blood pressure using the detected feature points; and calculating the highest blood pressure and the lowest blood pressure of the user by deducing a scatter diagram using the extracted variables.
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| Method and system for patient evaluation | 20080228091 | 20080918 |
| A method for evaluating a patient is disclosed herein. The method includes performing an exercise test on a patient, obtaining an electrocardiogram during the exercise test, converting the electrocardiogram to an audio file, and analyzing the audio file in order to evaluate the patient. A corresponding system for evaluating a patient is also provided.
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| Method for determining cardiac impulse conduction and associated medical device | 20080200822 | 20080821 |
| A method for determining cardiac impulse conduction, in particular three-dimensional cardiac impulse conduction, in a patient, comprising: generating an image recording of an area of the body of the patient capturing at least partially electrocardiogram electrodes arranged on the body of the patient by an imaging modality; determining positions of the electrocardiogram electrodes in a system of coordinates assigned to the imaging modality; recording of potential data of some of the electrocardiogram electrodes; and reconstructing cardiac impulse conduction depending on the determined positions of the electrocardiogram electrodes, the image recording and the recording of potential data of the electrocardiogram electrodes, wherein at least one image recording is generated substantially simultaneously with the recording of potential data of the electrocardiogram electrodes or is generated in the period... |
| Single catheter navigation for diagnosis and treatment of arrhythmias | 20080200913 | 20080821 |
| A method of conducting a therapeutic ablation of cardiac tissue based upon local electrical signals in the tissue. The method includes navigating at least one electrophysiology catheter to a plurality of locations on the surface of the heart using a remote navigation system; sensing the electrical activity in the heart tissue at a plurality of the locations in the heart; and storing a value representative of the control variables of the remote navigation system at the location and a value representative of the electrical signal at the location; displaying a representation of at least some of the locations where the electrical activity was sensed on a display using graphic indicators of the timing of the sensed activity relative to the reference; determining the location at which... |
| Ecg-based identification of impaired ikr kinetics | 20080188761 | 20080807 |
| A method of assaying impaired delayed rectifier potassium current function is disclosed. One or more electrocardiogram (ECG) signals are obtained. One or more heart rates corresponding to a plurality of beats of the one or more ECG signals are obtained. One or more T-wave amplitudes are determined corresponding to one or more beats of the one or more ECG signals. A determination is made whether the one or more T-wave amplitudes as a function of the one or more heart rates are relatively independent of the corresponding one or more heart rates, thereby indicating impaired delayed rectifier potassium current function. An associated biomarker, system, and method for determining the ability of a pharmacological agent to impair delayed rectifier potassium current function are also disclosed.
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| Heart monitoring system and method | 20080183088 | 20080731 |
| A system for heart monitoring comprises an IEGM input for an intracardiac electrocardiogram (IEGM) that is connected to an active filtering stage that is adapted to transform an incoming IEGM into an output ECG signal. The active filtering stage is connected to a filter characterization stage that is adapted to process a recorded, patient specific IEGM template and a corresponding SECG template and to adapt the filter characteristics of said active filtering stage such that the filter characteristics best characterize the input-output relationship between the IEGM template and the corresponding SECG template. As a consequence, the active filtering stage is adapted to transform an incoming IEGM such that the output ECG signal closely resembles a morphology of a corresponding SECG.
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| Apparatus for monitoring fetal heart-beat | 20080183092 | 20080731 |
| Apparatus for monitoring a fetal heart-beat is able to extract one or more fetal electrocardiograms (fECGs) from a composite signal detected at the abdomen of a pregnant woman. The apparatus includes specific low-noise components: a plurality of low-noise electrodes (1-3, R) for placement on the abdomen during pregnancy and a low-noise signal recording and processing means (34). Screened leads are also used, as required. Signals indicative of voltages developed between each abdominal electrode (1-3) and a reference electrode (R) are recorded in a plurality of signal channels. Data within each channel is digitised and processed in order to generate a plurality of separated source signals, at least one of which relates to the fECG of a single fetus. Single-channel fECGs may be reconstructed using the source... |
| Device and method for detecting cardiac impairments | 20080183093 | 20080731 |
| Electrocardiogram (ECG) recorded signals are processed by a computer-implemented method to substantially remove extraneous signals to produce intermediary signals, and to separate the intermediary signals using a non-orthogonal transformation method such as independent component analysis to produce independent components of signals. The separated signals are displayed to help physicians to analyze medical conditions and to identify locations of abnormal heart conditions.
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| Systems and methods for determining systolic time intervals | 20080167566 | 20080710 |
| A method and system for determining systolic time intervals, by analysis of radio frequency (RF) scatter patterns in conjunction with Electrocardiogram (ECG) data, is provided. An RF emitter is placed on the cardiac patient. The emitter includes two or more transmitting antennas which emit RF radiation into the cardiac patient, resulting in an RF scatter pattern. An RF sensor receives the scattered RF signals. The RF emitted from the antennas will differ spatially with regard to the RF sensor, causing the RF scatter patterns to differ from one another. A signal processor analyzes these differences to identify inhomogeneous structures, and to identify aortic valve motion, including aortic valve opening and closure. An electrocardiogram identifies the onset of the cardiac cycle. Systolic intervals are determined using the... |
| Prediction and prevention of postoperative atrial fibrillation in cardiac surgery patients | 20080167567 | 20080710 |
| Systems and methods are provided for predicting the onset of postoperative atrial fibrillation (AF) from electrocardiogram (ECG) data representing a patient. A signal processing component determines parameters representing the activity of the heart of the patient from the ECG data. A feature extraction component calculates a plurality of features useful in predicting postoperative AF from the determined parameters. A classification component determines an AF index for the patient from the calculated plurality of features. The AF index represents the likelihood that the patient will experience AF.
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| Method and apparatus for obtaining electrocardiogram (ecg) signals | 20080154116 | 20080626 |
| Embodiments of the subject invention relate to a method and apparatus for obtaining an electrocardiogram (ECG) signal. Embodiments can separate a true ECG signal from one or more signals due to electric fields caused by moving electrical charges. In a specific embodiment, an ECG signal can be separated from one or more electric fields caused by blood flow. An embodiment pertains to a joint MRI and diagnostic ECG system. In an embodiment, the joint diagnostic quality ECG can add information to a MRI cardiac study. This additional information can be useful for MR guided intervention treatments, such as locating tissue that created bad electrical arrhythmia. In an embodiment, the subject method and apparatus can be utilized to obtain an ECG for patient located in a magnetic... |
| Method and system for electrocardiogram evaluation | 20080154143 | 20080626 |
| A method for evaluating an electrocardiogram is disclosed herein. The method includes measuring an electrical activity of a patient, processing the measured electrical activity to form a multi-lead signal, and extracting a segment of the multi-lead signal. The method for evaluating an electrocardiogram also includes transforming the segment of the multi-lead signal into a synthesized signal that is most representative of the patient's electrical activity, and evaluating the synthesized signal. A corresponding system for evaluating an electrocardiogram is also disclosed.
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| Electrocardiogram signal-processing method and electrocardiogram signal-processing device | 20080146953 | 20080619 |
| [MEANS FOR SOLVING PROBLEMS] An electrocardiogram signal processing method for extracting an electrocardiogram signal of a fetus (1b) from a biopotential signal containing electrocardiogram signals of the mother's body (1) and a fetus (1b) inputted through an electrode (E) attached to the mother's body (1) during pregnancy, characterized by comprising reference signal generating step 4 of generating a reference signal for separating/extracting a fetus electrocardiogram signal of a specified induction type according to a beat rate signal inputted from a sensor (S) for detecting the beat rate of the fetus (1b) and a fetus electrocardiogram signal extracting step 5 of separating/extracting the fetus electrocardiogram signal of the specified induction type from the biopotential signal inputted through an electrode (E) according to the reference signal generated at... |
| Method for controlling a measurement of a magnetic resonance device on the basis of an electrocardiogram signal | 20080139926 | 20080612 |
| The method is related to control a measurement of a magnetic resonance device based on electrocardiogram signals of a patient detected by at least two channels. The method comprises the steps of: supplying the electrocardiogram signals in a first processing branch to a low pass filter and a derived value sum generator; comparing the output signal with a threshold value to generate a first comparison result; feeding the electrocardiogram signals in a second processing branch to a derived value generator; comparing said signals with an upper and a lower threshold value to generate a second comparison result; repeat the above steps for the second and if necessary further channels; evaluating all first and second comparison results for all channels in a weighted logic circuit; and triggering... |
| Use of external respiratory therapy device to detect cardiac electrical activity | 20080139948 | 20080612 |
| Methods and systems provide an integrated approach to respiratory and cardiac monitoring, diagnosis and/or therapy. A medical system includes one or more cardiac electrodes coupled to an external respiratory therapy device. The cardiac electrodes sense cardiac electrical activity that is used to generate an electrocardiogram (ECG) signal. Cardiac events, such as arrhythmia, myocardial infarction and/or ischemia, may be detected based on the sensed cardiac electrical activity.
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| Portable device and method for measuring heart rate | 20070299354 | 20071227 |
| A portable electronic device monitors the pulse or electrocardiogram of a person by integrated, attachable or wireless sensors. The portable device evaluates this data in real-time to assess heart rate variability coherence, and provide feedback through a variety of sounds and an array of LEDs. The feedback may be in the form of a breathing indicator or pacer usable as a respiratory cycle training system to indicate to the subject when the next breath should be taken. Such feedback may be correlated to the level of coherency the subject achieves. A coherence indicator may be used to provide the subject with real-time information relating to the level of coherence achieved.
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| Wireless electrode arrangement and method for patient monitoring via electrocardiography | 20070293774 | 20071220 |
| A wireless electrocardiogram (ECG) system is disclosed. The wireless ECG provides for recording potentials on the surface of a body. The wireless ECG includes a plurality of electrodes suitable for attachment to the surface of the body, a voltage measuring circuit for detecting a voltage between a reference voltage level and electrodes, an error detecting circuit, and a transmitting circuit for transmitting the detected voltage signal to a receiver. The disclosed system is robust in that it provides the capability of continuous monitoring of a subject while correcting for defects in an electrode, contact, presence of excessive noise or other developments in addition to providing the customary alarms in the event of disruptions.
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| Multi-parameter arrhythmia discrimination | 20070293896 | 20071220 |
| An arrhythmia discrimination device and method involves receiving electrocardiogram signals and non-electrophysiologic signals at subcutaneous locations. Both the electrocardiogram signals and non-electrophysiologic signals are used to discriminate between normal sinus rhythm and an arrhythmia. An arrhythmia may be detected using electrocardiogram signals, and verified using the non-electrophysiologic signals. A detection window may be initiated in response to receiving the electrocardiogram signal, and used to determine whether the non-electrophysiologic signal is received at a time falling within the detection window. Heart rates may be computed based on both the electrocardiogram signals and non-electrophysiologic signals. The rates may be used to discriminate between normal sinus rhythm and an arrhythmia, and used to determine absence of an arrhythmia.
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| Method of interfacing a sensor lead and a cardiac rhythm management device | 20070293902 | 20071220 |
| Embodiments of the invention provide a device for interfacing a specialized lead for sensing a specific physiological parameter, other than standard pacing and sensing of an electrocardiogram signal, with a conventional CRM device. This produces a lead-based sensing system that can be use with any CRM device that is capable of reading an electrocardiogram signal. In one embodiment, a lead-based sensing system for use with any CRM device that is capable of reading an electrocardiogram signal comprises a sensor configured to be coupled to any CRM device by a lead, and to generate a signal associated with a physiological parameter of a patient other than an electrocardiogram signal; and sensor electronics connected to the lead to convert the signal associated with the physiological parameter other than... |
| Cardiac motion artifact suppression using ecg ordering | 20070287907 | 20071213 |
| Described is a robust electrocardiogram (ECG) ordering technique of k-space for breath hold contrast enhanced magnetic resonance angiography (CE-MRA) that acquires the central part of k-space in a motion-free portion of diastole and fills in from the periphery of k-space at all other times. To make maximal use of the contrast enhancement, data is acquired continuously even when the ECG signal is lost. The ECG signal is monitored in real time. The ECG ordering technique allows a flexible acquisition matrix and is robust against ECG signal imperfections. The ECG ordering technique allows thoracic and pulmonary magnetic resonance angiography with a higher resolution when compared to the conventional gated sequence.
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| Pulse detection method and apparatus using patient impedance | 20070288060 | 20071213 |
| The presence of a cardiac pulse in a patient is determined by evaluating fluctuations in an electrical signal that represents a measurement of the patient's transthoracic impedance. Impedance signal data obtained from the patient is analyzed for a feature indicative of the presence of a cardiac pulse. Whether a cardiac pulse is present in the patient is determined based on the feature in the impedance signal data. Electrocardiogram (ECG) data may also be obtained in time coordination with the impedance signal data. Various applications for the pulse detection of the invention include detection of PEA and prompting PEA-specific therapy, prompting defibrillation therapy and/or CPR, and prompting rescue breathing depending on detection of respiration.
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| Physiological measuring system comprising a garment in the form of a sleeve or glove and sensing apparatus incorporated in the garment | 20070276213 | 20071129 |
| A measuring system for measuring electrocardiogram signals comprises a diagnostic garment with ECG electrodes that may assume the form of a sleeve or glove. A disposable version of the glove can be inflated. By using an inflatable glove, the contour of the body is automatically matched by the contour of the glove. Samples from the ECG electrodes positioned on a diagnostic garment are compensated so that the samples better approximate samples from EEG electrodes that are positioned at classical locations. Also, samples from ECG electrodes are compensated to reduce signal noise resulting from positioning the ECG electrodes on the diagnostic garment.
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| Image-guided navigation for catheter-based interventions | 20070276216 | 20071129 |
| A navigation system for catheter-based interventions, the system comprising a processing device; an angiogram x-ray system connected by data transfer connection to the processing device and capable of capturing angiographic images of a patient; an electrocardiogram monitoring device that is also connected by data transfer connection to the processing device and to the x-ray system; a medical instrument to be inserted into the area of the patient captured by the angiographic image; a position capture module for getting position information about the position of the medical instrument, the unit connected by data transfer connection to the processing device, wherein the processing device is capable of triggering the capturing of the angiographic images as a roadmap and superimposing on the roadmap the position information about the medical... |
| Exercise data apparatus | 20070276271 | 20071129 |
| Exercise data apparatus for use on the body of a user during exercise, comprises an electrocardiogram detector for detecting electrocardiogram data of said user during exercise; attachment means for attaching the electrocardiogram detector onto the chest of said user; a motion detector for detecting body motion data indicative of steps of said user during exercise; a processor for calculating exercise data based on the electrocardiogram data detected by the electrocardiogram detector and the body motion data detected by the motion detector, the exercise data comprising at least one of heart rate, speed and distance and calorie consumption of said user; and an output device for informing said user of the calculated exercise data.
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| Electrocardiogram analyzer | 20070276274 | 20071129 |
| The estimated contour positions of the atrium and ventricle are obtained from multi-channel electrocardiographic waveforms. Information useful to predict the possibility of the occurrence of fatal arrhythmia, such as the position of the maximum excitation propagation point, the distribution of the late potential(LP) as an index of depolarization abnormality, and the distribution of the RT dispersion as an index of repolarization abnormality are displayed together with the estimated contour positions.
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| Method and device for monitoring heart rhythm in a vehicle | 20070265540 | 20071115 |
| An heart rhythm monitoring device for a vehicle, which determines whether a driver has an arrhythmia includes a vehicle state determining portion that determines whether the vehicle is stopped; an electrode arranged on a steering wheel in a position where the driver grips the steering wheel; an electrocardiogram waveform obtaining portion that obtains a first electrocardiogram waveform from the electrode; and a signal processing and calculating portion that determines whether the heart rhythm of the driver is erratic based on the first electrocardiogram waveform. When the vehicle is in motion, the signal processing and calculating portion determines whether the heart rhythm of the driver is erratic based on the waveform component that is strong with respect to noise in the first electrocardiogram waveform.
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| Apparatus and method for measuring electric non-contact electrocardiogram in everyday life | 20070255152 | 20071101 |
| The present invention relates generally to an electric non-contact apparatus and method for taking electrocardiograms and, more particularly, to an electric non-contact apparatus and method for taking electrocardiograms, in which an examinee can have an electrocardiogram taken in a comfortable position because the apparatus and method are applied to a chair, a bed or a vehicle seat, which are widely used in daily life, and in which the examinee can unnoticeably have an electrocardiogram taken without being conscious of the taking of the electrocardiogram because the taking of the electrocardiogram is performed on the body of a human wearing clothes without directly contacting the body.
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| Cardiac monitoring via gastrointestinal stimulator | 20070255337 | 20071101 |
| The invention is directed to techniques for delivering electrical stimulation to a gastrointestinal tract of a patient via an implantable stimulator and monitoring electrical activity of a patient's heart by sensing cardiac signals via electrodes coupled to the implantable stimulator. The implantable stimulator may analyze the cardiac signals and generate a cardiac therapy recommendation for the patient, or may communicate the cardiac signals via telemetry circuitry to an external device for analysis. The sensed cardiac signals may be electrocardiogram (ECG) signals.
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| System for reconstruction of non-uniformly sampled signals | 20070244669 | 20071018 |
| A signal processing system allows reconstruction of a non-uniformly sampled analog signal including sampling an analog signal at a sampling period of resulting in a quantized non-uniformly sampled signal. The non-uniformly sampled signal includes a sampled signal and an amplitude error between a signal sampled with the equidistant sample period and the non-uniformly sampled signal. A reconstructed amplitude error is determined through the time offset and the non-uniformly sampled signal, and is subtracted from the non-uniformly sampled signal. The signal processing system may be implemented in an electrocardiogram monitoring device or a mobile phone device.
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| Method and apparatus for measuring blood pressures by using blood oxygen concentration and electrocardiography | 20070239039 | 20071011 |
| The present invention discloses a method and an apparatus for measuring blood pressures by using blood oxygen concentration and electrocardiography, and the method uses a blood oxygen concentration analyzer to measure a continuous change of waveforms of a blood oxygen cycle during a cardio arterial pulse and an electrocardiography to confirm the pulse period of the systolic pressure and diastolic pressure of the blood pressure and correspond the pulse period with the continuous change of waveforms measured by the blood oxygen concentration analyzer. The microprocessor computes the corresponding cross-sectional areas of the continuous change of waveforms and the pulse period measured by the electrocardiogram, and calculates the values of the systolic pressure and diastolic pressure by a preinstalled formula, so as to accurately measure the values... |
| Method of extracting low-frequency or high-frequency component from a signal with slope tracing waves | 20070232947 | 20071004 |
| This invention is about extracting two signals from the signal in which more than two frequency components are mixed. In detail, this is about extracting low or high frequency component by distinguishing signal distortion using slope tracing wave. This invention applies two slope tracing wave to an arbitrary signal to track signal distortion and extract and remove low frequency component such as the variation of electrocardiogram signal baseline or easily extract or remove 60 Hz interference wave easily introduced to electrocardiogram. In addition, this allows easy detection of a specific waveform such as P wave and T wave from the electrocardiogram diagram by using the difference between the arbitrary signal and two slope tracing wave. The methods of this invention include distinguishing signal distortion, and detecting,... |
| Capturing electrical signals with a catheter needle | 20070225610 | 20070927 |
| A method and medical system to take electrical readings includes an electrocardiogram (ECG) monitor, an electrode coupled to the monitor via a first lead and a needle such as an injection needle. The needle has a proximal end coupled to the monitor, where the monitor is able to measure an electrical pattern between the electrode and a distal end of the needle. In one example, the medical system is used to detect the contact, penetration, health and perforation of tissue at a target site.
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| Electrotherapy apparatus and method of treating a person or a mammal using such electrotherapy apparatus | 20070225770 | 20070927 |
| An electrotherapy apparatus for applying electrical stimulation to a muscle or group of muscles of a person or other mammal, wherein said electrical stimulation comprises electrical pulses, said electrical stimulation having parameters comprising at least some of an amplitude, a pulse repetition frequency, a duration of each pulse or group of pulses and a time offset relative to a predicted end of a T-wave of an electrocardiogram derived from said person or mammal, is characterized in that the electrotherapy apparatus is adapted to vary at least one of said amplitude, said pulse repetition frequency, said duration and said offset in accordance with a predetermined pattern, or randomly, within pre-specified limits in the course of a treatment extending over many heart cycles, typically over more than 15... |
| Instantaneous autonomic nervous function and cardiac predictability based on heart and pulse rate variability analysis | 20070219455 | 20070920 |
| A system and method that can simultaneously acquire electrocardiogram or pulse rate data (42, 44, 46), dynamically perform time-frequency (70) and chaotic analysis (60) in real-time, visually display the results in a convenient graphical format (50) and store the results in a computer file format (50).
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| Physiologic monitoring initialization systems and methods | 20070208232 | 20070906 |
| According to one aspect, physiologic monitor and/or firmware piracy are reduced by initializing physiologic monitors in the field, e.g. in medical facilities or user homes, upon verifying user authorization. A physiologic monitor may include sensors such as electrocardiogram (ECG) electrodes, accelerometers, respiratory and/or fluid load impedance electrodes, and a temperature sensor. The monitor may be connected to an initialization console, which activates and configures the monitor by transferring an authorization code, firmware, a set of enabled sensors and sampling rates, a set of customized voice messages, and other parameters, and/or by programming a programmable logic array. The initialization console may be a computer situated in a doctor's office or user's home, programmed with initialization and analysis software, and capable of connecting to an authorization server at... |
| Integrated physiologic monitoring systems and methods | 20070208233 | 20070906 |
| In some embodiments, a wearable physiologic monitor comprises a mixed analog and digital application-specific integrated circuit (ASIC) including signal conditioning circuitry, an A/D converter, a real-time clock, and digital control logic. The signal conditioning circuitry includes analog amplification circuitry, analog (continuous-time or switched capacitor) filtering circuitry before the A/D converter, and in some embodiments digital (DSP) filtering circuitry after the A/D converter. The monitor includes sensors such as electrocardiogram (ECG) electrodes, accelerometers, and a temperature sensor, some of which may be integrated on the ASIC. The digital control logic receives digital physiologic data sampled at different rates, assembles the data into physiologic data packets, time-stamps at least some of the packets, and periodically stores the packets in a digital memory. The monitor may include a disposable... |
| Dual-mode physiologic monitoring systems and methods | 20070208262 | 20070906 |
| In some embodiments, a wearable physiologic monitor comprises an application-specific integrated circuit (ASIC) including signal conditioning circuitry, a real-time clock, digital control logic, and mode-selection logic for setting an operating mode of the ASIC to a stand-alone mode or a peripheral mode. In the stand-alone mode, the digital control logic periodically stores data packets including multiple sensor data types in a digital memory such as a removable flash memory card. In the peripheral mode, the data packets are transmitted to a microcontroller for processing. The monitor includes sensors such as electrocardiogram (ECG) electrodes, accelerometers, and a temperature sensor, some of which may be integrated on the ASIC. The same basic chip design may be used in the stand-alone mode in disposable patches, and in the peripheral... |
| Apparatus for magnetically deployable catheter with mosfet sensor and method for mapping and ablation | 20070197891 | 20070823 |
| A mapping and ablation catheter is described. In one embodiment, the catheter includes a MOSFET sensor array that provides better fidelity of the signal measurements as well as data collection and reduces the error generated by spatial distribution of the isotropic and anisotropic wavefronts. In one embodiment, the system maps the change in potential in the vicinity of an activation wavefront. In one embodiment, the mapping system tracks the spread of excitation in the heart, with properties such as propagation velocity changes. In one embodiment, during measurement, the manifold carrying the sensor array expands from a closed position state to a deployable open state. Spatial variation of the electrical potential is captured by the system's ability to occupy the same three-dimensional coordinate set for repeated measurements... |
| Acquisition of multiple-lead electrocardiogram | 20070197925 | 20070823 |
| A system and method are disclosed to collect electrocardiograph data using a patient's hands. The patient's first hand is placed on a first and a second electrically conductive surface, such that the patient's first hand contacts portions of both the first and second electrically conductive surfaces and does not contact a third and a fourth electrically conductive surface. The patient's second hand is placed on the third and fourth electrically conductive surfaces, such that the patient's second hand contacts portions of both the third and fourth electrically conductive surfaces and does not contact the first and second electrically conductive surfaces. The electrically conductive surfaces are electrically isolated from one another and electrically connect the patient to an electrocardiograph. The ECG data is collected and displayed. The... |
| Method for analysing an intracardiac electrocardiogram and an electrophysiological system as well as a computer program product | 20070197926 | 20070823 |
| The present invention relates to a method for analysing an intracardiac electrocardiogram to identify at least one of the A wave, V wave and H wave on at least one of the electrogram signals, comprising the steps of pre-processing the electrogram signal; calculating an adaptive threshold for the A, V or H wave, wherein the adaptive threshold depends on the noise level of the electrogram signal and on the type of wave; and identifying the A, V or H wave by searching the electrogram signal within a time window determined e.g. from the position of another wave on the same or another electrogram signal.
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| Counter pulsation electrotherapy apparatus for treating a person or a mammal | 20070198064 | 20070823 |
| An electrotherapy apparatus comprising a sensor for detecting periodically recurring signal peaks, in particular the R-R peaks of an electrocardiogram of a person, a processor for deriving from said periodically recurring signal peaks a time delay corresponding to approximately the end of the next T-wave, a trigger system or circuit initiated by an output signal of said processor or embodied within said processor for applying electrical stimulations to one or more active electrodes provided on the said person at a time related to the end of said time delay is characterized in that the apparatus has a plurality of output channels for applying electrical stimulation to said one or more active electrodes provided on the said person.
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| Electrode array and system for detecting signals for electrocardiograms | 20070179376 | 20070802 |
| An electrode array is provided for a system for recording electrocardiogram signals. The array includes a sheet-like holding element, with a first electrode, a second electrode and a third electrode for connection to the skin of a patient. The electrodes are arranged at the holding element. A transmitting device is arranged at the holding element. A system is also provided for detecting electrocardiogram signals that includes the electrode array. The electrode array as well as the system for detecting electrocardiogram signals fastens a plurality of electrodes on the body of a patient without these having to be connected to one another based on the provision of a reference potential terminal (6). The reference potential terminal (6) is connected to the first electrode (3) and to the... |
| Implantable medical device sensing wireless ecg as substitute for intracardiac electrogram | 20070167849 | 20070719 |
| A cardiac rhythm management (CRM) system includes an implantable medical device that senses a wireless electrocardiogram (ECG), which is a signal sensed with implantable electrodes and approximating a surface ECG. In one embodiment, the wireless ECG is sensed as a substitute signal for the intracardiac electrogram when the sensing of the intracardiac electrogram becomes unreliable.
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| Method and apparatus for measuring blood volume, and vital sign monitor using the same | 20070167852 | 20070719 |
| A first member is adapted to measure an electrocardiogram of a patient. A second member is adapted to measure a peripheral pulse wave of the patient. A first calculator calculates a pulse wave propagation time (PWTT) and a heart rate (HR) of the patient based on the electrocardiogram and the peripheral pulse wave. A second calculator calculates a cardiac output (CO) of the patient with an equation of CO=(αK·PWTT+βK)·HR, where α, β and K are coefficients inherent to the patient.
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| Adaptive real time ecg triggering and uses thereof | 20070161916 | 20070712 |
| The present invention provides methods and apparatus for generating a trigger from the R wave of an electrocardiogram (ECG) waveform using a threshold that adapts to the slope of the R wave while still within the leading edge of the R wave.
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| Method of electrocardiogram (ecg) anaylysis and device thereof | 20060281996 | 20061214 |
| An analysis method of electrocardiogram (ECG) and the device thereof are provided. The method diagnoses a subject by non-invasive method to see whether the subject is at high risk of high mountain disease (HMD). The ECG analysis method comprises: first, detecting the ECG of the subject; transforming the ECG to obtain a plurality of heart rate variability (HRV) parameters; analyzing the HRV parameters and outputting an analyzed result.
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| Neurophysiological wireless bio-sensor | 20060276702 | 20061207 |
| This invention is directed to a wireless bio-sensor electrode for recording bio-potentials elicited from a subject or for providing a stimulus to a subject. A preferred embodiment is a wireless bio-sensor electrode for eliciting from a subject bio-potentials including averaged evoked potentials, nerve conduction studies, electromyographic activity, electrocardiogram or electroencephalogram, or for providing a stimulus to the subject for eliciting said bio-potentials. Another embodiment is the use of the wireless bio-sensor electrode for recording far-field and near-field bio-potentials in a subject in real-time and in a real-time neurophysiological monitoring/testing system.
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| Electrode for measuring electrocardiogram and electrocardiogram device including the same | 20060276715 | 20061207 |
| An electrode for measuring an electrocardiogram. The electrode comprises a signal detector operable to detect an electrocardiogram signal. An electrolytic gel is coated onto a first surface of the signal detector. The gel is electrically conductive and operable to adhere to a skin. A controller connector is electrically connected to the signal detector.
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| Device and method for combining two images | 20060262966 | 20061123 |
| The invention relates to a device and to a method for combining two images, especially for superimposition of static vascular maps (B), which were taken at different phases of the cardiac cycle and/or the respiratory cycle and were archived in a memory (6), on a current image (A) of a catheter (2, 8) in the vascular system (9). In the method, a defined section of a map image (B) around the estimated actual position of the catheter is selected and is displayed superimposed on the current image (A) in an image (C) on a monitor (10). The map image (B) used for this is preferably selected by means of an electrocardiogram to match the particular cardiac cycle. The position of the catheter relative to the map... |
| Method and apparatus for sequenced extraction from electrocardiogramic waveforms | 20060264768 | 20061123 |
| A method for extracting segments from an electrocardiogram tracing is disclosed. The method selects an electrocardiogram tracing for segment extraction, and associates a dosing time or other time point with the electrocardiogram tracing to align an extraction template within the electrocardiogram tracing for segment extraction. The electrocardiogram tracing is scanned for artifacts and the electrocardiogram tracing is annotated if any artifacts are discovered. If there are any artifacts present in the segment designated for extraction by the extraction template, the extraction template is modified to avoid the artifacts. If the extraction template cannot be modified, the electrocardiogram tracing is annotated as unextractable. If artifacts are not present in the segment designated for extraction by the extraction template or the extraction template was successfully modified, the designated... |
| Method and apparatus for rapid interpretive analysis of electrocardiographic waveforms | 20060264769 | 20061123 |
| A method for analyzing a subject-visit group of ECG waveforms captured digitally on an electrocardiograph machine, on a Holter monitor device or digitized from paper electrocardiograms. A cardiologist selects a subject-visit group from a number of subject-visit groups, and each ECG waveform of the subject-visit group is scanned for artifact. Those ECG waveforms containing artifact are annotated appropriately. A determination is made if measurement calipers are present in each ECG waveform, measurement calipers are added to ECG waveforms lacking measurement calipers, and a preliminary interpretation is assigned to each ECG waveform that lacks a preliminary interpretation. Each ECG waveform is assigned a grouping metric, and the ECG waveforms are segregated according to their grouping metric for display and evaluation.
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| Method and device for determining the presence of an ischemic area in the heart of a human being or an animal | 20060264770 | 20061123 |
| The invention relates to a method for determining the presence of an ischemic area in the heart of a patient, comprising the steps of A placing several sense electrodes at different positions on the patient's body; B obtaining electrocardiogram (ECG) signals from the heart via each sense electrode; C determining the presence of the ischemic area in the heart on the basis of the ECG signals obtained in step B. The invention also relates to a device for carrying out the method according to the invention. According to the invention, the method for determining the presence of an ischemic area in the heart is characterized by the steps of D analysing the various ECG signals obtained in step B; and E determining the location of the... |
| Apparatus for evaluating cardiovascular functions | 20060264771 | 20061123 |
| An apparatus is provided for evaluating cardiovascular functions. The apparatus combines the principles of measuring pressure and pulse signals, and monitors blood pressure, pulse wave velocity and electrocardiogram (ECG) signals simultaneously. An inflatable cuff measures blood pressure and pulse wave velocity. The apparatus also calculates systolic pressure, diastolic pressure, mean arterial pressure and other parameters related to blood pressure. The apparatus not only calculates vascular Stiffness Index (SI), vascular Reflection Index (RI) and other arterial related parameters but also Pulse Wave Velocity (PWV), heartbeat, QRS interval, ST segment, and other ECG parameters.
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| System and method for presenting defibrillator status information while in standby mode | 20060259080 | 20061116 |
| A video display coupled to an automatic external defibrillator (AED) and capable of full-motion video can support added functionality of the AED. One advantage of the video display is that it can be used to present standby status information of the AED quickly to an AED operator while the AED is in a low power standby mode or non-operative state. The video display may present status information in response to touching the display or activating a button while the AED is in a non-operative state. When the AED is in an operative state, such as during a rescue, the display may comprise a graphical user interface that may be navigated using touch-screen technology or buttons built into the AED. During a rescue, the video display may... |
| Arrhythmia discrimination using electrocardiograms sensed from multiple implanted electrodes | 20060253044 | 20061109 |
| Cardiac monitoring and/or stimulation methods and systems provide for monitoring, diagnosing, defibrillation and pacing therapies, or a combination of these capabilities, including cardiac systems incorporating or cooperating with neuro-stimulating devices, drug pumps, or other therapies. Embodiments of the present invention relate generally to implantable medical devices employing automated cardiac activation sequence monitoring and/or tracking for arrhythmia discrimination. Embodiments of the invention are directed to devices and methods involving sensing a plurality of composite cardiac signals using a plurality of implantable electrodes. A source separation is performed using the sensed plurality of composite cardiac signals and the separation produces one or more cardiac signal vectors associated with one or more cardiac activation sequences that is indicative of ischemia. A change of the one or more cardiac signal... |
| Automatic capture verification using electrocardiograms sensed from multiple implanted electrodes | 20060253164 | 20061109 |
| Cardiac monitoring and/or stimulation methods and systems that provide one or more of monitoring, diagnosing, defibrillation, and pacing. Cardiac signal separation is employed for automatic capture verification using cardiac activation sequence information. Devices and methods sense composite cardiac signals using implantable electrodes. A source separation is performed using the composite signals. One or more signal vectors are produced that are associated with all or a portion of one or more cardiac activation sequences based on the source separation. A cardiac response to the pacing pulses is classified using characteristics associated with cardiac signal vectors and the signals associated with the vectors. Further embodiments may involve classifying the cardiac response as capture or non-capture, fusion or intrinsic cardiac activity. The characteristics may include an angle or an... |
| Electrocardiograph device having additional lead function and method for obtaining additional-lead electrocardiogram | 20060235317 | 20061019 |
| There are provided an electrocardiograph with an extended lead function and an extended lead ECG deriving method capable of easily deriving an ECG signal of an extended lead ECG by an arithmetic operation, based on ECG signals of a standard 12-lead ECG measured by a potential detector 10. An ECG memory 12 stores the ECG signals measured as the standard 12-lead ECG by the potential detector 10. An extended lead ECG calculator 16 calculates extended lead ECGs V7-V9 from the ECG signals stored in the ECG memory 12, using coefficients α representing a relationship among leads. The extended lead ECGs V7-V9 calculated are displayed through an extended lead ECG waveform outputting device 18 on a display monitor 20.
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| Ecg rhythm advisory method | 20060235320 | 20061019 |
| A method of automatically determining which type of treatment is most appropriate for a cardiac arrest victim, the method comprising transforming one or more time domain electrocardiogram (ECG) signals into a frequency domain representation comprising a plurality of discrete frequency bands, combining the discrete frequency bands into a plurality of analysis bands, wherein there are fewer analysis bands than discrete frequency bands, determining the content of the analysis bands, and determining the type of treatment based on the content of the analysis bands.
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| Ecg filtering | 20060235321 | 20061019 |
| A method of obtaining a filtered electrocardiogram is provided. The method includes the steps of obtaining a vectorcardiogram, filtering the vectorcardiogram to form a filtered vectorcardiogram, and transforming the filtered vectorcardiogram into a filtered electrocardiogram. The method may also include the preliminary step of obtaining an electrocardiogram, and then transforming the electrocardiogram into the vectorcardiogram.
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| Portable personal positioner | 20060229809 | 20061012 |
| A portable personal positioner for determining the geographical position of the user without employing the Global Positioning System (GPS) comprising a signal/position display and a traveling speed/distance measuring sensor, wherein the signal/position display is equipped with microprocessor, magneto-resistive sensor and altimeter to measure traveling direction signal along X and Y axis and position signal along Z axis of the use respectively, and to transmit the measured signals to the microprocessor for recording and access, meanwhile the traveling speed/distance measuring sensor is also to measure traveling speed and distance of a user and transmit the measured signals by means of wired or wireless transmission to the microprocessor for recording and access, after data processing from the microprocessor, to obtain the data of traveling speed, traveling distance, geographical... |
| Method and system of aircraft pilot assessment | 20060220883 | 20061005 |
| A method and system are disclosed for assessing the capability of a first person to operate a machine, such as an aircraft or other transport vehicle. The method includes the steps of: (a) Sensing the value of at least one, and preferably two or more information parameters for assessing the fitness of the person operating the machine. The parameters include one or a combination of electroencephalogram information, electrocardiogram information, heart rate information, respiratory rate information, eye motion information, eyelid position information, eyelid motion information, expired gas mixture information, blood oxygen content information, blood oxygen saturation information and blood pressure information for the person operating the machine, and/or information about operation of the machine as well as information about actions taken by the person operating the machine.... |
| Device and method for producing images of the heart | 20060215815 | 20060928 |
| The invention relates to a device and a method for producing an image of the heart (5), in which the image is preferably three-dimensional and is reconstructed from a series of X-ray projection pictures from various projection directions. In this connection, the electrocardiogram (7) is recorded in parallel with the X-ray pictures and used by a data processing device (10) to control the picture-taking rate, the X-ray pulse duration, the tube current and/or the tube voltage of the X-ray device (1) in such a way that, during the phase to be displayed of maximum movement of the heart, the mean X-ray exposure rate is higher than during the other phases. The data processing device (10) may furthermore use the electrocardiogram to drive an injection pump (8)... |
| Method and system for processing electrocardiograms | 20060217623 | 20060928 |
| In a method and system for processing an electrocardiogram (ECG), digital ECG data are received. The digital ECG data evinces a plurality of a patient's heartbeats detected during an ECG. Digital annotation data are generated representing marking to be shown on an ECG tracing of the plurality of heartbeats. An annotated ECG tracing image is produced using the digital ECG data and the digital annotation data.
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| Method and system for analyzing an electrocardiographic signal | 20060189876 | 20060824 |
| A method for analyzing an ECG signal includes obtaining a measurement of an area based repolarization interval from at least one beat in the electrocardiogram signal and detecting an altered ventricular repolarization based on the obtained measured area based repolarization interval.
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| Apparatus for detecting sleep apnea using electrocardiogram signals | 20060184056 | 20060817 |
| An apparatus for diagnosing sleep apnea only uses an electrocardiogram signal and a computer processor and associated computer code that are configured to analyze the electrocardiogram signal and classify each time period of the electrocardiogram signal as either apneic or normal. A diagnostic measure of sleep apnea for the human patient is provided based on classification results obtained by combining a results for various electrocardiogram signal time periods. A computer-readable medium has computer code that causes the computer to analyze an electrocardiogram signal relating to the human patient and classify each time period in a set of time periods as either apneic or normal. A diagnostic measure of sleep apnea is provided based on classification results obtained by combining a plurality of results from the set... |
| Methods and systems for real time breath rate determination with limited processor resources | 20060178591 | 20060810 |
| A method for recognizing occurrences of breaths in respiratory signals. The method includes receiving digitized respiratory signals that includes tidal volume signals, filtering the received respiratory signals to limit artifacts having a duration less than a selected duration, and recognizing breaths in the filtered respiratory signals. A breath is recognized when amplitude deviations in filtered tidal volume signals exceed a selected fraction of an average of previously determined breaths. This invention also include methods for recognizing breathes from electrocardiogram R-waves; computer methods having code for performing the methods of this invention; monitoring systems that monitor a subject and include local or remote computers or other devices that perform the methods of this invention.
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| Method of selecting part of a run of echocardiography images | 20060173336 | 20060803 |
| In a system wherein an electrocardiogram corresponding with a run of images is acquired and displayed simultaneously with the run of echocardiography images, data are deduced from the digital signal representation of the displayed electrocardiogram and these data are used to identify a part of the run of images.
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| Bio signal measuring apparatus and method | 20060173373 | 20060803 |
| A bio signal measuring apparatus. The bio signal measuring apparatus includes an electrocardiogram measuring attached to the skin of a patient to measure an electrocardiogram signal of the patient. A heart sound sensor contacts the skin of the patient to measure a heart sound signal of the patient. A controlling unit obtains bio information including at least a heart rate from the electrocardiogram signal using the heart sound signal.
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| Cpr time indicator for a defibrillator data management system | 20060173500 | 20060803 |
| A system is disclosed wherein patient data, such as an electrocardiogram (“ECG”) signal or a chest impedance measurement signal, collected by a defibrillator device during a resuscitation event is analyzed and processed by a computing device to provide an assessment of CPR administered during the event. The CPR assessment results in one or more CPR figures of merit that relate to temporal characteristics of the CPR relative to the duration of the event. In one embodiment, the CPR figure of merit represents a percentage of the event period during which chest compressions were administered to the patient.
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| Algorithms for detecting cardiac arrhythmia and methods and apparatuses utilizing the algorithms | 20060167364 | 20060727 |
| A method for detecting a cardiac arrhythmia from an electrocardiogram includes the steps of identifying a plurality of R-waves in the electrocardiogram during a predetermined time interval; extracting heartbeat complexes corresponding to the identified R-waves; identifying a key region within each heartbeat complex that is morphologically altered in the event of the cardiac arrhythmia; calculating a statistical measurement of an ensemble of the key regions from each of the heartbeat complexes; and determining from the statistical measurement whether the cardiac arrhythmia occurred during the predetermined time interval. An apparatus is also provided that includes a processor that is coupled to receive an electrocardiogram, and is configured in response thereof to perform the method for detecting a cardiac arrhythmia.
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| Feature-based editing for electrocardiography | 20060161066 | 20060720 |
| A method and system for generating electrocardiogram reports allows for the editing of features in the electrocardiogram interpretation process. This improves the accuracy of machine interpretation of the ECG data thereby facilitating the analysis and generation of the final report by the physician. The present method and system are most useful in host-based ECG interpretation systems where the physician accesses the ECG data at a workstation including a machine interpretation that is generated typically at the ECG cart. The physician is then provided with the ability to modify the features in the ECG data and generate a new host-based interpretation based on the original ECG data and the features specified by the physician.
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| Method and apparatus for transfer of captured electrocardiogram data | 20060149156 | 20060706 |
| A method for transfer of electrocardiograph data between a remote processor connected to a central processor via a network. Identification information concerning a test subject associated with electrocardiograph data stored on a portable storage medium is entered into a remote processor. The remote processor extracts the electrocardiograph data from the portable storage medium and transmits the identification information and the electrocardiograph data from the remote processor to a central processor. Upon receipt and storage of the electrocardiograph data, the central processor transmits a release message to the remote processor to enable erasure of the electrocardiograph data from the portable storage medium.
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| Wireless, internet-based, medical diagnostic system | 20060142648 | 20060629 |
| A system for monitoring a patient's vital signs that features a vital-sign monitor including sensors for measuring from the patient at least one of the following vital-sign data: O2 saturation, blood pressure, electrocardiogram, respirator rate, and blood glucose level. The system also includes a global positioning system that determines location-based data. A wireless transmitter, in electrical contact with the vital-sign monitor and global positioning system, receives the vital-sign and location-based data and wirelessly transmits these data through a conventional wireless network. A gateway software piece receives and processes the data from the wireless network and stores these data in a computer memory associated with a database software piece. The system also includes an Internet-based user interface that displays the vital sign data for both individual patients... |
| Sensor system, garment and heart rate monitor | 20060142654 | 20060629 |
| The invention relates to a sensor system, a garment and a heart rate monitor. The sensor system comprises at least one flexible film structure comprising: a first insulation layer and at least one electric conductor layer formed on top of the first insulation layer and comprising an electrode area, which is configured to establish an electric contact with the surface of the user's skin and to generate as output an electric signal proportional to a momentary value of the electrocardiogram.
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| Wireless transmitted electrocardiogram monitoring device | 20060111640 | 20060525 |
| A wireless transmitted electrocardiogram monitoring device is disclosed. A conductive fabric of the device features on that it is used to be a sensing component with characters of comfort, air permeability, softness, and stretchability thus achieves long-term signal measurement. The processing and transmission method of electrocardiogram signals is characterized in the wireless transmission of the electrocardiogram signals being detected. The signal receiving component (part) is for collecting data, displaying, storage, output and calculation of values. Therefore, a wireless transmitted electrocardiogram monitoring device is applied for long-term monitoring of the physical status of users.
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