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Class 600/512 - Orthogonal heartbeat electric signals combined to form vector signal


Subclass of Class 600 - Surgery
Definition: Subject matter wherein electric signals detected in orthogonal
No. of patents: 132
Last issue date: 04/17/2012


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NumberTitleIssue Date
8160684Method and apparatus for detecting arrhythmias in a medical device
A method of detecting a cardiac event in a medical device that includes sensing cardiac signals from a plurality of electrodes forming a first sensing vector and a second sensing vector, and determining whether the sensing of cardiac signals along the first sensing ...
04/17/2012
8095207Implantable medical device with inter-atrial block monitoring
An implantable medical device includes a voltage measurement circuit to measure a potential difference between implanted electrodes in a thorax of a living being, the potential difference resulting from an electrical P-wave cardiac signal. The implantable medical de...
01/10/2012
8036734Method for determining cardiac impulse conduction and associated medical device
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 a...
10/11/2011
8005532Electrocardiograph with extended lead function, and extended lead electrocardiogram deriving method
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...
08/23/2011
7996072Positionally adaptable implantable cardiac device
Cardiac sensing and/or stimulation devices and methods that adapt to implant location and positioning, and may employ automated vector selection from multiple electrodes. Devices include a housing having a first face opposing a second face, and an edge extending aro...
08/09/2011
7941206Automatic orientation determination for ECG measurements using multiple electrodes
Cardiac monitoring and/or stimulation methods and systems provide monitoring, defibrillation and/or pacing therapies. A signal processor receives a plurality of composite signals associated with a plurality of sources, separates a signal using a source separation al...
05/10/2011
7917196Arrhythmia discrimination using electrocardiograms sensed from multiple implanted electrodes
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 pum...
03/29/2011
7907993Method and apparatus for detecting arrhythmias in a medical device
A method of detecting a cardiac event in a medical device that includes sensing cardiac signals from a plurality of electrodes forming a first sensing vector and a second sensing vector, and determining first heart rate estimates associated with cardiac signals sens...
03/15/2011
7894889ECG signal power vector detection of ischemia or infarction
A method comprising sensing at least one cardiac signal representative of cardiac activity of a subject using an implantable medical device (IMD), calculating, from the cardiac signal, a first dominant vector corresponding to a direction and magnitude of maximum sig...
02/22/2011
7890159Cardiac activation sequence monitoring and tracking
Cardiac monitoring and/or stimulation methods and systems provide monitoring, diagnosis, and defibrillation and/or pacing therapies. A signal processor receives a plurality of composite signals associated with a plurality of sources, performs a source separation, an...
02/15/2011
7805185Posture monitoring using cardiac activation sequences
Cardiac monitoring and/or stimulation methods and systems that provide one or more of monitoring, diagnosing, defibrillation, and pacing. Cardiac signal separation is employed to detect, monitor, track and/or trend a patient's posture using cardiac activation sequen...
09/28/2010
7797036Cardiac activation sequence monitoring for ischemia detection
Cardiac monitoring and/or stimulation methods and systems that provide one or more of monitoring, diagnosing, defibrillation, and pacing. Cardiac signal separation is employed to detect, monitor, track and/or trend ischemia using cardiac activation sequence informat...
09/14/2010
7751874Display for ECG diagnostics
A medical display for analyzing heart signals includes a cardiographic display which displays an electrocardiograph (ECG) heart signal segment of a patient having a magnitude and location in vector format within a single three-dimensional (3D) coordinate system (vec...
07/06/2010
7751875Device and system 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 of the human heart may be correlated with waveforms specific for stand...
07/06/2010
7738949Method and apparatus for spectrum estimation
The invention relates to a method for transforming physiological data from the time domain to the frequency domain. The method includes the steps of: providing a plurality of digital data in the time domain; providing a microcomputer programmed to run a recursive Fo...
06/15/2010
7734333Method and apparatus for detecting arrhythmias in a medical device
A method of detecting a cardiac event in a medical device that includes sensing a cardiac signal from a plurality of electrodes, determining amplitudes of the sensed cardiac signal during a predetermined sensing window, determining a noise to signal ratio correspond...
06/08/2010
7706866Automatic orientation determination for ECG measurements using multiple electrodes
Cardiac monitoring and/or stimulation methods and systems provide monitoring, defibrillation and/or pacing therapies. A signal processor receives a plurality of composite signals associated with a plurality of sources, separates a signal using a source separation al...
04/27/2010
7689271Non-invasive heart rate and respiration measurements from extremities
The invention determines the heart rate and respiration rate of a patient through the patient's extremities. Heart rate and respiration rate are determined via an energy spectrum, periodogram or histogram using a time series analysis. A patient can stand near the de...
03/30/2010
7610084System 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 template depolarization complex. The system is particularly suitable for...
10/27/2009
7567836ECG 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 corresponding to a direction and magnitude of maximum signal power of a f...
07/28/2009
7542795Vector 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 coordinates is a measure of time, the system and method can collect ECG d...
06/02/2009
7444179Devices, 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 reconstruction of the measured rhythm; determining a first value related to t...
10/28/2008
7436990Blood 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 dynamically acquired tomogram. An inverse filter is then calculated from the ...
10/14/2008
7340294Impedance 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 electrodes. The carrier signals are out of phase. The outputs from the electro...
03/04/2008
7336995Method of and apparatus for tachycardia detection and treatment
Method and apparatus for preventing heart rhythm disturbances by recording cardiac electrical activity, measuring beat-to-beat variability in the morphology of electrocardiographic waveforms, and using the measured beat-to-beat variability to control the delivery of...
02/26/2008
7336998External discrimination between pace pulses at different heart locations
This document discusses, among other things, an external device capable of independently distinguishing between pace pulses delivered by an implantable cardiac rhythm management device to different locations of a subject's heart. In one example, polarity of the pace...
02/26/2008
7310551Diagnostic 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 diagnostic vector is plotted on a Cartesian graph to form a visual gauge ...
12/18/2007
7301845Defect address storing circuit for semiconductor memory device
A defect address storing circuit for a semiconductor memory device comprises a plurality of fuse pairs formed in a fuse region and a plurality of transistors formed in a transistor region outside the fuse region. The plurality of fuse pairs and the plurality of tran...
11/27/2007
7289843Software for mapping potential distribution of a heart chamber
A computer software program is described that maps the electrical activity of a patient's heart. The software program utilizes inputs from electrodes contained within a heart chamber. Inputs from the electrodes cause the program to calculate the heart chamber volume...
10/30/2007
7283865Device and method for determining a cardiac condition using a complex signal formed from a detected cardiac signal
In a device and a method for determining a cardiac condition from a detected cardiac signal, an input signal is formed from the detected cardiac signal and supplied to an analysis unit. The analysis unit forms an analysis signal from the input signal, having a real ...
10/16/2007
7277745Implantable myocardial ischemia detection, indication and action technology
One embodiment enables detection of MI/I and emerging infarction in an implantable system. A plurality of devices may be used to gather and interpret data from within the heart, from the heart surface, and/or from the thoracic cavity. The apparatus may further alert...
10/02/2007
7272436System and method for distinguishing among cardiac ischemia, hypoglycemia and hyperglycemia using an implantable medical device
Techniques are described for detecting ischemia, hypoglycemia or hyperglycemia based on intracardiac electrogram (IEGM) signals. Ischemia is detected based on a shortening of the interval between the QRS complex and the end of a T-wave (QTmax), alone or in combinati...
09/18/2007
7266408Device 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 of the human heart may be correlated with waveforms specific for stand...
09/04/2007
7248916Automated system and method for establishing a patient status reference baseline
A system and method for determining a reference baseline of individual patient status for use in an automated collection and analysis patient care system is described. A set of collected measures is retrieved from a medical device adapted to be implanted in a patien...
07/24/2007
7245962System 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 the heart during sinus rhythm via electrodes, (b) creating a map bas...
07/17/2007
7236826System and method for graphically configuring leads
Systems and methods are provided for graphically configuring leads for a medical device. According to one aspect, the system generally comprises a medical device and a processing device, such as a programmer or computer, adapted to be in communication with the medic...
06/26/2007
7194299Differentiating ischemic from non-ischemic T-wave inversion
A method of differentiating between ischemic and cardiac memory inverted T-waves includes performing an electrocardiogram of a patient; identifying inverted T-waves in at least some of precordial leads; identifying T-waves in leads I and aVL; diagnosing ischemia if ...
03/20/2007
7187968Apparatus for acquiring and transmitting neural signals and related methods
Neurochip for Neuroprosthetic Control. According to one embodiment, a neural spike detection system is provided. The neural spike detection system can include a signal receiver operable to receive a plurality of neural signals including neural spikes. The system can...
03/06/2007
7181268Ischemia detection
Techniques for detection and treatment of myocardial ischemia are described that monitor both the electrical and dynamic mechanical activity of the heart to detect and verify the occurrence of myocardial ischemia in a more reliable manner. The occurrence of myocardi...
02/20/2007
7181269Implantable device that diagnoses ischemia and myocardial infarction and method
An implantable device detects and discriminates between ischemia and myocardial infarction. The device includes a plurality of electrodes that provide a plurality of cardiac activity sensing electrode configurations. A sensing circuit provides a plurality of electro...
02/20/2007
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