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7623913 Implantable medical devices using heuristic filtering in cardiac event detection  
Methods for performing cardiac signal analysis in an implanted medical device, and devices configured to perform illustrative methods of cardiac signal analysis. A cardiac signal is captured by an...
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...
7610086 System and method for detecting cardiac ischemia in real-time using a pattern classifier implemented within an implanted medical device  
Pattern classification techniques are provided for use with an implantable medical device for detecting cardiac ischemia substantially in real-time. Values representative of morphological features...
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...
7558623 Means and method for the detection of cardiac events  
Disclosed is a system for the detection of cardiac events that includes an implanted device called a cardiosaver, a physician's programmer and an external alarm system. The system is designed to...
7539535 Real-time, high frequency QRS electrocardiograph with reduced amplitude zone detection  
Real time cardiac electrical data are received from a patient, manipulated to determine various useful aspects of the ECG signal, and displayed in real time in a useful form on a computer screen or...
7524287 System and method for distinguishing between hypoglycemia and hyperglycemia using an implantable medical device  
Techniques are described for detecting and distinguishing among ischemia, hypoglycemia or hyperglycemia based on intracardiac electrogram (IEGM) signals. In one technique, these conditions are...
7509159 Method and apparatus for detecting cardiac repolarization abnormality  
Method and apparatus for detecting cardiac repolarization abnormality using at least one electrocardiogram signal. The at least one electrocardiogram signal can be obtained from any number of...
7484129 Physiologic event monitoring device having robust internal control  
Categories are established for use in physiological monitoring devices and these categories are prioritized such that data indicative of a critical event self-triggers a communication to an...
7480529 Method and apparatus for cardiac arrhythmia classification using sample entropy  
An implantable medical device includes an arrhythmia detection and classification system that classifies an arrhythmia episode based on an irregularity parameter and/or a complexity parameter. The...
7477936 System and a method for analyzing ECG curvature  
A system or a method for analysing ECG curvature wherein at least one among a number of different parameters is isolated, for indicating symptoms of diseases having influence on the ECG curvature....
7463926 Automatic signal amplitude measurement system in the setting of abnormal rhythms  
A system for automatically evaluating the sensing and detection of physiological processes by an implantable medical device, such as an implantable cardiac stimulation device. The system includes...
7412283 Method and system for processing electrocardial signals  
Known methods of heart function analysis, while useful, suffer from a number of limitations. These include the fact that these methods are inherently static, in that they consider an individual...
7386340 System for the diagnosis and monitoring of coronary artery disease, acute coronary syndromes, cardiomyopathy and other cardiac conditions  
Cardiac electrical data are received from a patient, manipulated to determine various useful aspects of the ECG signal, and displayed and stored in a useful form using a computer. The computer...
7379771 Conduction based automatic therapy selection  
A system comprising an implantable medical device includes a ventricular heart signal sensing circuit, a pacing therapy circuit, and a controller circuit coupled to the signal sensing circuit and...
7376458 Method for defining signal templates in implantable cardiac devices  
Template formation methods for use in implantable cardiac rhythm management devices. In an illustrative method, a signal is captured signal an implanted cardiac rhythm management device, and...
7328066 Implantable cardiac stimulation device, system and method that identifies and prevents impending arrhythmias of the atria  
An implantable cardiac stimulation device includes a system that identifies and prevents the occurrence of impending atrial arrhythmias. A sensing circuit senses atrial activity of a patient's...
7295874 Intermittent stress augmentation pacing for cardioprotective effect  
A device and method for delivering electrical stimulation to the heart in a manner which provides a protective effect against subsequent ischemia is disclosed. The protective effect is produced by...
7289845 Curvature based method for selecting features from an electrophysiologic signal for purpose of complex identification and classification  
A method for curvature based complex identification and classification comprises sensing a cardiac signal and computing curvatures at sample points on the sensed cardiac signal. Then to extract...
7274959 System and method for detecting cardiac ischemia using an implantable medical device  
A technique is provided for detecting episodes of cardiac ischemia based on an examination of post-T-wave signal segments. Since cardiac ischemia is often a precursor to acute myocardial infarction...
7257443 Method and apparatus for detecting oscillations in cardiac rhythm with electrogram signals  
A cardiac rhythm management device is configured to detect oscillations in cardiac rhythm by comparing electrogram signals during successive heart beats. Upon detection of electrical alternans, the...
7254440 Implantable ischemia and myocardial infarction monitor and method  
An implantable ischemia detecting devices generates a plurality of electrograms for analysis. A processor integrates the ST segment and T wave of each electrogram and normalizes the resulting...
7236819 Separation of a subcutaneous cardiac signal from a plurality of composite signals  
A cardiac monitoring and/or stimulation method and systems provide monitoring, defibrillation and/or pacing therapies, including systems detecting and/or treating cardiac arrhythmia. A system...
7225015 System and method for detecting cardiac ischemia based on T-waves using an implantable medical device  
A technique is provided for detecting episodes of cardiac ischemia based on an examination of the total energy of T-waves. Since cardiac ischemia is often a precursor to acute myocardial infarction...
7194299 Differentiating 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...
7184816 Cardiac stimulating and detecting device, system and method for identifying far field signals  
In an implantable heart stimulating device, system and method, a control circuit has first and second circuits for sensing and pacing. The first circuit can be connected to a first electrode member...
7184815 System and method for selection of morphology templates  
A template selection method involves providing a plurality of templates representing a type of cardiac event. One or more characteristics of each template are evaluated. The evaluations are...
7181269 Implantable 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...
7174204 Methods for quantifying the morphology and amplitude of cardiac action potential alternans  
Methods and apparatus for determining T-wave alternan signatures (i.e., morphology and polarity) derived from a physiologic signal representative of a subject's heart activity; assessing changes in...
7123953 Method and system for evaluating arrhythmia risk with QT-RR interval data sets  
A method of assessing the cardiac arrhythmia risk in a subject to provide a measure of cardiac or cardiovascular health in that subject is described herein. In one embodiment, the method comprises...
7085599 Characterization of supraventricular rhythm using collected cardiac beats  
The supraventricular rhythm of a patient's heart is characterized using cardiac beats collected during a plurality of time periods, some of which are noncontiguous. Pacing parameters may be...
7072709 Method and apparatus for determining alternans data of an ECG signal  
Method and apparatus for determining alternans data of an ECG signal. The method can include determining at least one value representing at least one morphology feature of each beat of the ECG...
7072708 Differentiating acute myocardial infarction from other ECG abnormalities  
A method in a computer system for detecting myocardial infarction including the steps of (a) receiving ECG data, (b) analyzing that data for the presence of benign ST data, and (c), when the ST...
7069069 Implantable cardiac device for and method of monitoring progression or regression of heart disease by quantifying morphological features  
An implantable cardiac device and method provides for monitoring a progression or regression in heart disease during an extended time period. A sensor generates an electrogram signal representing...
7027867 Implantable cardiac device having a system for detecting T wave alternan patterns and method  
A system and method for use in an implantable cardiac device that delivers electrical therapy to a patient's heart determines if a T wave alternan pattern of the patient's heart exists. The system...
6990372 Programmable signal analysis device for detecting neurological signals in an implantable device  
A programmable signal analysis device for detecting and counting neurological and muscular events in living tissue that incorporates one or more signal threshold levels to identify an event, a...
6947789 Method for detecting, sizing and locating old myocardial infarct  
Algorithms for detecting, sizing and locating old myocardial infarcts by evaluating particular ECG lead data derived from selected ECG leads, where that particular data is presented hierarchically...
6942622 Method for monitoring autonomic tone  
A method for monitoring the progression of the hemodynamic status of a patient by tracking autonomic tone. For example, the method may be applied to patients suffering from heart failure, diabetic...
6915158 Cardiac stimulating device with morphology sensitive detection and method for automatically creating a morphology template  
In a method for automatic creation of a template for a morphology sensitive detector for an implantable cardiac stimulating device and a cardiac stimulating device operating according to the...
6915156 Intracardiac detection and control of repolarization alternans  
Nonlinear-dynamical control, also known as chaos control, can modulate human cardiac electrophysiological dynamics by stabilizing an unstable target rhythm. Intracardiac, repolarization alternans...
6850796 Method and apparatus to optimally measure cardiac depolarization/repolarization instability  
A method of identifying and measuring altemans in an electrocardiographic (ECG) signal representative of the electric activity of a heart of a patient. The ECG signals from the patient are divided...
6721592 Automatic electrogram measurement  
Techniques for monitoring the magnitudes of representative filtered EGM signals over time. In a typical implementation, a group of digital peak values is generated in a time period and a...
6668189 Method and system for measuring T-wave alternans by alignment of alternating median beats to a cubic spline  
An electrocardiogram processing technique for measuring T-wave alternans by which the alternating electrocardiogram signals are aligned to a target cubic spline. The target cubic spline is...
6615075 QRST subtraction using an adaptive template for analysis of TU wave obscured atrial activity  
The present invention provides a noninvasive localization, characterization and classification apparatus and method for cardiac arrhythmias. The invention enables discrete isolation of the...
6507753 Method and apparatus to detect acute cardiac syndromes in specified groups of patients using ECG  
In order to reduce bias associated with conventional ECG analysis, the present invention provides a method and apparatus to improve diagnosis of acute cardiac syndromes (ACS), such as acute...
6496723 Method of obtaining information that corresponds to electrocardiogram of human body from pulse wave thereof  
A method of obtaining information that corresponds to the R—R interval of electrocardiogram from the pulse-wave of a human body. The method is comprised of steps of detecting the pulse-wave of a...
6468263 Implantable responsive system for sensing and treating acute myocardial infarction and for treating stroke  
Disclosed is a completely implantable system that can detect the occurrence of a myocardial infarction, i.e., a heart attack, and automatically inject a thrombolytic and/or anti-thrombogenic agent...
6397100 Axis shift analysis of electrocardiogram signal parameters especially applicable for multivector analysis by implantable medical devices, and use of same  
We show how to determine whether there has been an axis shift in an electrocardiogram waveform and how to use this for filtering out bad electrocardiogram information and to modify an adaptive...
6370423 Method for analysis of biological voltage signals  
Method of analyzing biological signals representative of voltage changes, including obtaining an analog biological signal representative of voltage changes, using digital processing software to...
6339720 Early warning apparatus for acute Myocardial Infarction in the first six hours of pain  
A portable device ( 8 ) for recognizing Acute Myocardial Infarction by the patient himself without the help of medical doctors or technicians is described. The invention performs a real-time...
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