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7620449 |
Differentiating ischemic from non-ischemic T-wave inversion
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...
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7614878 |
System and method for dynamic control of ultrasonic magnetostrictive dental scaler
A magnetostrictive ultrasonic dental scaler is disclosed. The magnetostrictive device comprises an oscillator adapted to provide electrical energy including a current and a voltage signal, a...
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7613506 |
Method for deriving standard 12-lead electrocardiogram, and monitoring apparatus using the same
Four first electrodes are attached on right clavicle, the vicinity of on left clavicle, on right lowermost rib, and the position on left lowermost rib, corresponding to limb leads 12-lead...
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7610084 |
System and method for classifying cardiac depolarization complexes with multi-dimensional correlation
A system and method for classifying cardiac depolarization complexes in which waveforms of a depolarization complex are sensed by separate electrodes and correlated with template waveforms of a...
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7567836 |
ECG signal power vector detection of ischemia or infarction
A system comprising a processor that includes a cardiac signal vector module and an ischemia detection module. The cardiac signal vector module is configured to measure a first dominant vector...
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7542795 |
Vector superimposition and graphical display of physiological data without or before analysis
The two ECG channels are graphed as an X-Y pair where the X coordinate is the voltage in a first ECG channel and the Y coordinate is the voltage in a second ECG channel. Because neither of the...
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7516017 |
Biological parameter output apparatus and program
It is an object of the invention to measure the change in action potential waveforms during administration of a drug by testing in cultured cells or in animals, and using this measurement to...
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7509170 |
Automatic capture verification using electrocardiograms sensed from multiple implanted electrodes
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...
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7444179 |
Devices, systems and methods for characterization of ventricular fibrillation and for treatment of ventricular fibrillation
A method of determining a state of ventricular fibrillation, includes: measuring the rhythm of the heart during ventricular fibrillation for a period of time; creating a lagged phase space...
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7436990 |
Blood flow dynamic analyzer and its method, and image diagnostic apparatus
According to the present invention, a Fourier transformation is executed on a time-concentration curve for an inflow artery and a time-concentration curve for each tissue on the basis of a...
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7340294 |
Impedance measurement apparatus for assessment of biomedical electrode interface quality
Apparatus for assessing the electrical properties of patient-electrode interfaces has a carrier signal source injecting two carrier signals comprising an AC signal with a DC offset to the...
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7310551 |
Diagnostic gauge for cardiac health analysis
A diagnostic gauge for cardiac health is described. Multiple parameters pertaining to a patent's cardiac health are distilled to a single diagnostic vector having an angle and a magnitude. The...
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7266408 |
Device and procedure for visual three-dimensional presentation of ECG data
The invention relates to the analysis of ECG data by exploiting computerized three-dimensional spatial presentation of the measured data using the vector concept. A three-dimensional presentation...
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7245962 |
System and method for determining reentrant ventricular tachycardia isthmus location and shape for catheter ablation
A method and system for identifying and localizing a reentrant circuit isthmus in a heart of a subject during sinus rhythm is provided. The method may include (a) receiving electrogram signals from...
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7149573 |
Method and apparatus for impedance signal localizations from implanted devices
A patient monitoring system including an implantable medical device for monitoring a plurality of physiological factors contributing to physiological conditions of a patient's heart by measuring a...
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7117030 |
Method and algorithm for spatially identifying sources of cardiac fibrillation
A method and computer program product comprising an algorithm adapted to execute a method of identifying the spatial coordinates of a sustaining source of fibrillatory activity in a heart by...
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7043292 |
Single or multi-mode cardiac activity data collection, processing and display obtained in a non-invasive manner
The method of presenting concurrent information about the electrical and mechanical activity of the heart using non-invasively obtained electrical and mechanical cardiac activity data from the...
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6920349 |
System and method for predicting the onset of cardiac pathology using fractal analysis
The onset of cardiac pathology can be predicted by first acquiring a plurality of lead values as a function of time for set of electrocardiogram leads and defining a spatial curve from the lead...
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6804550 |
Method and apparatus for frank lead reconstruction from derived chest leads
In an ECG monitoring and analyzing system of the type where electrodes are placed on a subject for detecting electrical activity of a heart, and where the electrode placement is such that Frank...
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6766190 |
Method and apparatus for developing a vectorcardiograph in an implantable medical device
Implantable medical devices (IMDS) are adapted for developing a vectorcardiograph (VCG) from signals across pairs of electrodes. Sense amplifiers of the IMD are calibrated to correlate the signals...
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6760622 |
Implantable multi-chamber cardiac stimulation device with sensing vectors
An implantable multi-chamber cardiac stimulation device and method are provided for accurately sensing cardiac activity from three or four heart chambers using passive sensing electrodes placed in...
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6760615 |
Method and apparatus for discriminating between tachyarrhythmias
Implantable medical devices (IMDs) are adapted for developing a vectorcardiograph (VCG) from signals across pairs of electrodes. Sense amplifiers of the IMD are calibrated to correlate the signals...
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6754523 |
Method of analysis of the electrocardiogram
A method of analyzing the electrocardiogram (“ECG”) using a set of vectors mathematically derived from the heart vector. The entire ECG waveform of one representative heartbeat is analyzed as a...
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6725085 |
Method and apparatus for characterizing cardiac tissue from local electrograms
The property of cardiac tissue at a local site, a plurality of sites of in a region of a heart may be characterized based on local electrograms measured at the local site, at a plurality of sites...
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6721591 |
Method of deriving standard 12-lead electrocardiogram and electrocardiogram monitoring apparatus
A plurality of electrodes for measuring electrocardiogarphic waveforms are attached on body surface positions that constitute a subset of the standard 12-lead system. The measured...
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6600948 |
Method for velocity component vector mapping
An elongate probe apparatus ( 20 ) for insertion into the body of a subject, comprising: a structure ( 24 ) having a substantially rigid configuration; a plurality of physiological sensors ( 26,...
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6526313 |
System and method for classifying cardiac depolarization complexes with multi-dimensional correlation
A system and method for classifying cardiac depolarization complexes in which waveforms of a depolarization complex are sensed by separate electrodes and correlated with template waveforms of a...
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6438409 |
Methods of characterizing ventricular operations and applications thereof
New methods of characterising ventricular operations by measuring propagation characterisics of the repolarisation wavefront (the T wave) are disclosed, the methods use new descriptions of T wave...
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6424860 |
Myocardial ischemia and infarction analysis and monitoring method and apparatus
A myocardial analysis and monitoring method, comprising the steps of receiving a number of ECG signals relating to a heartbeat of at least one patient, converting the received number of ECG signals...
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6415174 |
ECG derived respiratory rhythms for improved diagnosis of sleep apnea
Respiratory rhythms of a subject are derived from measured ECG signals utilizing leads placed for significant influence of chest movement on the ECG signals. The QRS pulses within ECG signals...
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6409660 |
Portable telemedicine device
A portable telemedicine device used in prehospital, preliminary diagnostic procedures and treatments includes a data processing unit for receiving and processing data. Measurement devices for...
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6389310 |
Method and apparatus for analyzing heart function using 4D ECG synchronized heart cavity tomoscintigraphy
A computer program storage medium readable by a computing system and encoding a computer program of instructions for executing a computer process for the treatment of data obtained from...
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6360121 |
Intracardiac potential analyzing apparatus and method
An intracardiac potential analyzing apparatus for calculating a progressing direction and speed of an excitation wave front from information on time from a reference point set on a time axis of an...
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6282440 |
Method to identify electrode placement
An ECG signal is acquired in multiple channels, and sources of interference are filtered from the signals. A covariance matrix is then formed with the channels of data. The invention then employs...
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6073046 |
Heart monitor system
A medical facility after discharge of a cardiovascular patient, can remain in contact with the patient. The patient is provided with a multiple lead EKG terminal spread placed on the body, and the...
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6052615 |
Method and apparatus for sensing and analyzing electrical activity of the human heart using a four electrode arrangement
A method of sensing and analyzing electrical activity of the human heart comprises the sensing of voltage signals generated by the heart between four electrodes (E, A, S and I) located at key...
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5987348 |
ECG triggered MR imaging method and apparatus
A method of imaging a portion of a body placed in a static magnetic field by means of magnetic resonance (MR) includes the measurement of ECG data of the body in the form of a vector cardiogram,...
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5944669 |
Apparatus and method for sensing cardiac function
An apparatus and method for sensing cardiac function in a patient, particularly adaptable to being worn by an ambulatory patient. Including sensor to receive ECG signals in at least plane of the...
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5840038 |
Method and apparatus for signal averaging and analyzing high resolution P wave signals from an electrocardiogram
A method and apparatus for signal averaging and analyzing high resolution P wave signals from an electrocardiogram. The method and apparatus for averaging the P wave portion of ECG signals includes...
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5803084 |
Three dimensional vector cardiographic display and method for displaying same
A cardiographic display for displaying an electrocardiograph heart signal in vector format within a single three-dimensional coordinate system sampled at incremental time intervals and combining...
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5697377 |
Catheter mapping system and method
A system and method are provided for catheter location mapping, and related procedures. Three substantially orthogonal alternating signals are applied through the patient, directed substantially...
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5694942 |
Analysis of heart waveforms
A method and apparatus of analysing Ventricular Late Potential (VLP) including determining a parameter related to the complexity of the VLP as a parameter for clinical evaluation. The method may...
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5634469 |
Method for localizing a site of origin of an electrical heart activity
In a method for localizing an origination site of electrical heart activity, body surface potentials generated by the heart activity are measured at a number of measuring points with a...
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5579764 |
Method and apparatus for spatially specific electrophysiological sensing in a catheter with an enlarged ablating electrode
Orthogonal sensors, which are comprised of two or more electrodes and generally disposed circumferentially on the catheter at given longitudinal point along the catheter, receive signals which are...
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5556419 |
Implantable cardiac stimulator with analyzer that continously compares radius of derived heart signal
A device for identifying abnormal conditions in a heart retrograde conduction and tachyarrhythmias in particular, includes a differentiating circuit electrically connected to a heart to be...
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5487391 |
Systems and methods for deriving and displaying the propagation velocities of electrical events in the heart
Systems and methods examine heart tissue morphology by locating electrodes in contact with a region of heart tissue to sense the timing of a local depolarization events. From this, the systems and...
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5485849 |
System and methods for matching electrical characteristics and propagation velocities in cardiac tissue
Systems and methods examine heart tissue morphology using three or more spaced apart electrodes, at least two of which are located within the heart in contact with endocardial tissue. The systems...
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5474078 |
Method and system for near real-time analysis and display of electrocardiographic signals
The multidimensional ECG processing and display system of the present invention is used with an electrocardiographic (ECG) monitoring system. Input ECG data from multiple, sequential time intervals...
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5458116 |
Display system and method for three-dimensional vectorcardiograms
An apparatus and method for displaying a time history of a vectorcardiogram. The method enables a clinician to create a history of a three-dimensional vectorcardiogram from an arbitrary time axis...
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5427112 |
Device for analyzing the function of a heart
A device for analyzing the function of a heart, containing a measurement unit for generating a first measurement signal related to a first electrical or mechanical heart variable and an evaluation...
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