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| Number | Title | Issue Date |
| 6192273 | Non-programmable automated heart rhythm classifier A nonprogrammable automated heart rhythm classifier that may be used alone or in conjunction with a therapy system for delivering shock treatment or therapeutic drugs to a patient, a monitoring or recording system, a paging or alarm system, or other rhyth... | 02/20/2001 |
| 6179865 | Cross chamber interval correlation A system and method for discriminating cardiac rhythms occurring in an antegrade direction from cardiac rhythms occurring in a retrograde direction. Atrial and ventricular contractions are sensed, from which atrial and ventricular cycle lengths are determ... | 01/30/2001 |
| 6178347 | Apparatus for frequency analysis of atrial fibrillation An apparatus for frequency analysis of atrial fibrillation, as a measure of the state of the illness which includes a device for registration of electrical signals from the heart of a patient, a device for separating a signal originating from the atrium a... | 01/23/2001 |
| 6171257 | Method and system for predicting the immediate success of a defibrillatory shock during cardiac arrest A method and system (30, 50) for predicting the immediate success of a defibrillatory shock during cardiac arrest are shown. The sequencing of cardiopulmonary resuscitation is determined by an electronic computer (80) based on the probability of success a... | 01/09/2001 |
| 6169919 | System and method for quantifying alternation in an electrocardiogram signal A system and method for quantifying alternation in the T-wave and ST segment of an ECG signal receives a digitized ECG signal (i.e., ECG data) for processing. The ECG data are used to calculate an odd median complex for the odd beats in the ECG data and a... | 01/02/2001 |
| 6129678 | System of noninvasively determining a patient's susceptibility to arrhythima A system for detecting a patient's susceptibility to arrhythmias and cardiac tissue abnormality is disclosed. The system consists of a computer, a display software loaded onto the computer that generates graphical user interfaces (GUIs), an electronic int... | 10/10/2000 |
| 6097983 | Cardiac event detecting system for a heart stimulator A cardiac event detecting system for an implantable heart stimulator intended to be connected to the heart of a patient through at least two unipolar electrode leads or at least one bipolar electrode lead having one electrode pole in the atrium and one el... | 08/01/2000 |
| 6094593 | Method and apparatus for detecting prospenity for ventricular fibrillation using action potential curves A method for detecting a heart disorder comprises examination of a phase-plane plot (PPP) of a patient electrocardiogram (EKG). The PPP's degree of deterministic chaos may be measured by a processor. Analysis of the PPP may indicate a propensity for fibri... | 07/25/2000 |
| 6064906 | Method, system and apparatus for determining prognosis in atrial fibrillation A system, apparatus and method for determining prognosis in atrial fibrillation non-invasively detects electrical activity of the heart with external electrodes, such as with ECG leads. The diagnostic system, apparatus and method provide a non-invasive te... | 05/16/2000 |
| 6061592 | Device for detecting tachycardia using a counter A device for detecting pathological tachycardia, in particular for use with an implantable device for terminating tachycardias, having a classifican device, responding to at least one electrical signal derived from the heart, which if the classification... | 05/09/2000 |
| 6052617 | System and method for reliably detecting atrial events of a heart using only atrial sensing An atrial defibrillator including a cardioverter for applying cardioverting electrical energy to atria of a heart when the atria are in need of cardioversion and an atrial arrhythmia detector for detecting if the atria are in need of cardioversion include... | 04/18/2000 |
| 6041251 | System and method for detecting atrial events of a heart A continuous monitoring system monitors atrial activity of a heart and activates an atrial fibrillation detector when atrial fibrillation is suspected. The system includes an A wave detector for detecting A waves of the heart and providing an A wave detec... | 03/21/2000 |
| 6021345 | Methods for detecting propensity for fibrillation using an electrical restitution curve A method for detecting a heart disorder comprises examination of a phase-plane plot (PPP) of a patient electrocardiogram (EKG). The PPP's degree of deterministic chaos may be measured by a processor. Analysis of the PPP may indicate a propensity for fibri... | 02/01/2000 |
| 6016442 | System for displaying cardiac arrhythmia data A medical device system and method of plotting symbols representing complexes of selected arrhythmic events on an interactive display screen, for organizing, displaying and interacting with a patient's recorded arrhythmia episodes. Stored arrhythmic episo... | 01/18/2000 |
| 5978700 | Recognizing ventricular tachycardia condition using dual chamber sense information An apparatus for detecting ventricular tachycardia includes a first and snd calculation unit, each having an input side connected to a ventricle sensor and an atrium sensor, respectively, and to a timer, for calculating the R--R and P--P intervals betwee... | 11/02/1999 |
| 5957856 | Method and system for predicting the immediate success of a defibrillatory shock during cardiac arrest A method and system (30, 50) for predicting the immediate success of a defibrillatory shock during cardiac arrest are shown. The sequencing of cardiopulmonary resuscitation is determined by an electronic computer (80) based on the probability of success a... | 09/28/1999 |
| 5954665 | Cardiac ablation catheter using correlation measure Apparatus for endocardiac therapy, including an elongate probe for insertion into the heart of a subject, the probe having distal and proximal ends. The probe includes an ablation device near the distal end of the probe for ablating heart tissue and at le... | 09/21/1999 |
| 5951592 | Apparatus and method for applying antitachycardia therapy based on ventricular stability An implantable cardioversion/defibrillation device includes a cardioversion signal generator and a defibrillator signal generator. Heart beat rates are classified into a first, an intermediate and a second range. A ventricle state determinator is also pro... | 09/14/1999 |
| 5951484 | Method of noninvasively determining a patient's susceptibility to arrhythmia A method for detecting a patient's susceptibility to arrhythmias and cardiac tissue abnormality is disclosed. The method consists of using a computer, a display, software loaded onto the computer that generates graphical user interfaces (GUIs), an electro... | 09/14/1999 |
| 5921940 | Method and apparatus for using physiologic stress in assessing myocardial electrical stability The non-invasive, dynamic tracking and diagnosing of cardiac vulnerability to ventricular fibrillation involves analysis of both cardiac electrical stability and the influence of autonomic activity. The magnitude of alternation in an electrocardiogram is ... | 07/13/1999 |
| 5902249 | Method and apparatus for detecting artifacts using common-mode signals in differential signal detectors An apparatus analyzes a composite input signal to determine whether the amount of common mode signal in the composite signal is unacceptably high; thus, precluding an accurate diagnosis of the differential mode signal of interest. Method steps include sep... | 05/11/1999 |
| 5891170 | Method and apparatus for advanced tachyarrhythmia discrimination An active implantable medical device of the defibrillator/cardiovertor type with advanced tachycardia discrimination in which the device monitors the atrial and ventricular activity, suspects and confirms the presence of tachycardia episodes in the monito... | 04/06/1999 |
| 5876349 | Method and apparatus for ventricular fibrillation detection Provided are a method and apparatus for assessing the chaotic nature of a waveform representation of heart function. The method and apparatus accomplish their objects via the following. An indicator of triangular-like components within a waveform represen... | 03/02/1999 |
| 5868680 | Quantitative characterization of fibrillatory spatiotemporal organization Described is a method for monitoring the spatiotemporal organization of atrial arrhythmias, especially atrial fibrillation, based on an analysis of sequences of activation patterns obtained from a particular set of atrial recording sites. This analysis me... | 02/09/1999 |
| 5868793 | Methods and apparatus for improved tachycardia discrimination in an active medical device An active implantable medical device of the defibrillator/cardiovertor type with an improved tachycardia discrimination for utilizing the delivery of a therapy of defibrillation and/or cardioversion and/or antitachycardia stimulation in the ventricle and/... | 02/09/1999 |
| 5857977 | Method and apparatus for separation of ventricular tachycardia from ventricular fibrillation for implantable cardioverter defibrillators A method and appartus for differentiating between ventricular tachycardia and ventricular fibrillation includes a pair of electrodes located on a single catheter which, in conjunction with an implantable cardioverter device, utilize two channel ventricula... | 01/12/1999 |
| 5843133 | Dynamic bandwidth control in an implantable medical cardiac stimulator An implantable medical device for electrically stimulating the heart to beat includes a sense circuit for detecting cardiac electrical activity. The sense circuit includes a band pass filter with an adjustable frequency response. The frequency response ca... | 12/01/1998 |
| 5842997 | Non-invasive, dynamic tracking of cardiac vulnerability by simultaneous analysis of heart rate variability and T-wave alternans A method and an apparatus for the non-invasive, dynamic tracking and diagnosing of cardiac vulnerability to ventricular fibrillation are disclosed. T-wave alternans and heart rate variability are simultaneously evaluated. T-wave alternation is an absolute... | 12/01/1998 |
| 5827197 | System for detecting atrial fibrillation notwithstanding high and variable ventricular rates There is disclosed an implantable atrial defibrillator for applying cardioverting electrical energy to the atria of a heart when the atria are in need of cardioversion. The atrial defibrillator includes a sense channel adapted to be associated with at lea... | 10/27/1998 |
| 5825672 | Method and apparatus for automatically detecting patterns in digital point-ordered signals The present invention is a method and system for detecting a physical feature of a test piece by detecting a pattern in a signal representing data from inspection of the test piece. The pattern is detected by automated additive decomposition of a digital ... | 10/20/1998 |
| 5817134 | Apparatus and method for detecting atrial fibrillation by morphological analysis In an implantable cardiac device, atrial signals, spaced either spatially or temporally, are sensed and stored. The morphology of the signals are compared and an atrial fibrillation indication is generated if the signals are different. The device then eit... | 10/06/1998 |
| 5797399 | Method and apparatus for identifying and correctly responding to abnormal heart activity A pattern recognition system for use in an implantable cardioverter defibrillator that is capable of responding correctively to abnormal activity of the heart efficiently and specifically. The system of the present invention first establishes a template s... | 08/25/1998 |
| 5792065 | Method and apparatus for determining T-wave marker points during QT dispersion analysis A method and apparatus for analyzing QT dispersions in ECG lead signals, comprising acquiring a plurality of ECG lead signals, filtering said signals to remove noise without distorting the T-wave morphology, determining critical T-wave marker points, and ... | 08/11/1998 |
| 5779645 | System and method for waveform morphology comparison A ventricular tachycardia (VT) complex is distinguished from a sinus tachycardia or a supraventricular tachycardia. A template based on morphology of a normal sinus rhythm is collected. A test signal is compared against the template to determine how close... | 07/14/1998 |
| 5776072 | Discrimination of atrial and ventricular signals from a single cardiac lead A method and system for discriminating atrial and ventricular signal components from a single heart lead, and for using this information for identifying an arrhythmia condition as being atrial or ventricular in origin. The invention is effective in identi... | 07/07/1998 |
| 5772604 | Method, system and apparatus for determining prognosis in atrial fibrillation A system, apparatus and method for determining prognosis in atrial fibrillation non-invasively detects electrical activity of the heart with external electrodes, such as with ECG leads. The diagnostic system, apparatus and method provide a non-invasive te... | 06/30/1998 |
| 5766225 | System and method for distinguishing between VF/VT bradycardia or asystole A system and method for more reliably detecting and treating arrhythmias such as ventricular fibrillation and tachycardia are provided. The system reacts to the detection of VF/VT by first looking for one or more sensed R waves to confirm arrhythmia. If t... | 06/16/1998 |
| 5755739 | Adaptive and morphological system for discriminating P-waves and R-waves inside the human body The present invention is a method and apparatus for processing a sensed atrial electrogram in conjunction with a sensed ventricular electrogram. The present invention permits accurate discrimination of atrial P-waves from far field ventricular events such... | 05/26/1998 |
| 5730141 | Tachyarrhythmia detection method A method for detecting cardiac arrhythmias which includes the steps of detecting a patient's cardiac activity, counting the number of intervals which satisfy a first selected criterion, and producing a sinus interval history count indicative of the number... | 03/24/1998 |
| 5718241 | Apparatus and method for treating cardiac arrhythmias with no discrete target A method and apparatus for treating cardiac arrhythmias with no discrete focus. More particularly, one or more catheters are used to collect local information concerning a patient's heart, the information is analyzed to determine where lines or points of ... | 02/17/1998 |
