Matches 251 - 300 out of 352 < 1 2 3 4 5 6 7 8 >
Match Document Document Title
5464430 Method and apparatus for detection and treatment of tachycardia and fibrillation  
An automatic implantable device for detecting and differentiating between tachyarrhythmias in order to therapeutically stimulate the heart in response thereto, particularly for distinguishing...
5464432 Implantable atrial defibrillator having an intermittently activated fibrillation detector  
An implantable automatic atrial defibrillator powered by a depletable battery power source conserves battery power for extending the predicted life of the defibrillator by intermittently detecting...
5458619 Apparatus and method for treating a tachyarrhythmia  
An antitachyarrhythmia device employing a tachycardia termination methodology in which antitachycardia pacing and cardioversion pulse therapies are combined. After detection of an arrhythmia which...
5458621 Automatic gain control and method for enabling detection of low and high amplitude depolarization activation waves of the heart and atrial defibrillator utilizing the same  
An apparatus reliably detects a depolarization activation wave of the heart. The apparatus includes a sensor in electrical contact with the heart for sensing electrical activity of the heart and...
5454837 Implantable medical system with optical communication between a treatment site and a therapy-generating apparatus  
An implantable medical system, having an implanted therapy-generating apparatus which administers a medical therapy in vivo to a treatment site remote from the therapy-generating apparatus,...
5447522 Capacitor charging circuit for implantable defibrillator  
An implantable defibrillator having a charging circuit for charging a high-voltage energy storage capacitor from a low voltage battery. Current from the battery is switched on and off through the...
5447519 Method and apparatus for discrimination of monomorphic and polymorphic arrhythmias and for treatment thereof  
An implantable cardioverter/defibrillator system provided with method and apparatus for discrimination between monomorphic arrhythmias, e.g. ventricular tachycardia from polymorphic arrhythmias,...
5433729 Atrial defibrillator, lead systems, and method  
An implantable atrial defibrillator provides a pulse of defibrillating electrical energy to the atria of the heart in synchronism with sensed R waves in response to non-coincident sensing of an R...
5431681 Combination pacing and defibrillating lead having sensing capability  
A lead, for use in combination with an implanted pulse generator which may be a pacemaker or defibrillator or combination thereof. The lead can deliver an electrical charge to pace, cardiovert or...
5417713 Transesophageal defibrillating system  
A transesophageal defibrillating system includes a large area anterior patch electrode and a large area posterior patch electrode, as in some conventional exterior defibrillating systems. An...
5411524 Method and apparatus for synchronization of atrial defibrillation pulses  
A method and apparatus for detecting and treating atrial fibrillation. In response to detecting atrial fibrillation, the device derives an escape interval based on one or more preceding intervals...
5403356 Method and apparatus for prevention of atrial tachy arrhythmias  
A method and apparatus for pacing the atrium to reduce the incidence of dangerous arrhythmias. Electrodes are located at least two locations within the atrium, preferably in the triangle of Koch...
5403351 Method of transvenous defibrillation/cardioversion employing an endocardial lead system  
The method comprises defibrillating or cardioverting a heart, employing either an implanted or an external defibrillation/cardioversion device capable of generating electrical shocks, by...
5391185 Atrial cardioverter with ventricular protection  
A method and system for conducting atrial defibrillation of a patient while mitigating the rest of the defibrillation countershock to prevent unwanted ventricular fibrillation. The system comprises...
5391187 Semiautomatic defibrillator with heart rate alarm driven by shock advisory algorithm  
A defibrillator with an alarm driven by both a heart rate detector and a fibrillation/tachycardia advisory algorithm. The defibrillator is a semiautomatic. By driving the alarm from both sources,...
5366497 Non-invasive, radiolucent cardiac electrode  
A non-invasive radiolucent electrode for stimulating the heart is disclosed. The electrode is configured to include at least one pad having a first surface adapted to contact the patient's skin,...
5354316 Method and apparatus for detection and treatment of tachycardia and fibrillation  
An apparatus for detecting, identifying and treating tachyarrhythmias. Tachyarrhythmias are detected and identified by the use of overlapping ranges of intervals. Provisional identification of...
5354315 Cardiac stimulator with data converter for cardiac signal  
An implantable cardiac stimulator with an analog-to-digital converter which comprises timing means for defining measurement cycles. During successive cycles, the value of a cardiac waveform is...
5350404 Lead system for use with an atrial defibrillator and method  
An implantable atrial defibrillator provides a pulse of defibrillating electrical energy to the atria of the heart in synchronism with sensed R waves in response to non-coincident sensing of an R...
5350401 Implantable cardioverter/defibrillator device having means for determining and treating low amplitude ventricular fibrillation and method thereof  
An ICD/pacemaker device provides a shocking pulse whenever it senses cardiac activity indicative ventricular fibrillation by standard means and a unique algorithm to respond to low amplitude...
5284135 Electrical connection between transcutaneous pacing circuitry and defibrillation circuitry  
Apparatus for transcutaneously pacing and defibrillating the heart of a patient, having defibrillation pulse discharge circuitry 30 and pacing stimuli generator circuitry 42, both circuits having...
5282836 Atrial defibrillator and method for providing pre-cardioversion pacing  
An implantable atrial defibrillator provides cardioverting electrical energy to the atria of a human heart in need of cardioversion. The atrial defibrillator includes a first detector for detecting...
5282837 Atrial defibrillator and method  
An implantable atrial defibrillator provides a pulse of defibrillating electrical energy to the atria of the heart in synchronism with sensed R waves in response to non-coincident sensing of an R...
5269300 Automatic sensitivity control in an implantable cardiac rhythm management system  
A method and apparatus for automatically adjusting the sensing threshold in an automatic implantable cardioverter/defibrillator with pacing capability. Fixed sensitivity is used for a specified...
5265600 Atrial defibrillator and method for providing post-cardioversion pacing  
An implantable atrial defibrillator applies cardioverting electrical energy to the atria of a human heart in need of cardioversion and thereafter gradually returns the cardiac rate of the heart to...
5257621 Apparatus for detection of and discrimination between tachycardia and fibrillation and for treatment of both  
An implantable cardioverter/defibrillator provided with method and apparatus for discrimination between ventricular tachycardia and ventricular fibrillation. The device is provided with two pairs...
5251621 Arrhythmia control pacer using skeletal muscle cardiac graft stimulation  
An antiarrhythmia pacemaker and method detect and confirm the occurrence of an abnormal condition of a patient's heart selected from the group comprising tachycardia, fibrillation and precursors...
5215083 Apparatus and method for arrhythmia induction in arrhythmia control system  
An implantable medical device and method for providing therapy to a patient's inadequately functioning heart are disclosed. The device and method utilize a defibrillation electrode lead system to...
5205283 Method and apparatus for tachyarrhythmia detection and treatment  
An implantable cardioverter capable of delivering pacing and cardioversion level therapies. The device distinguishes between stable and unstable ventricular tachyarrhythmias by monitoring the...
5203326 Antiarrhythmia pacer using antiarrhythmia pacing and autonomic nerve stimulation therapy  
An antiarrhythmia pacemaker detects the occurrence of an abnormal condition of a patient's heart and, in response, delivers an antiarrhythmia therapy to the patient which includes two components,...
5193535 Method and apparatus for discrimination of ventricular tachycardia from ventricular fibrillation and for treatment thereof  
An implantable cardioverter/defibrillator provided with method and apparatus for discrimination between ventricular tachycardia and ventricular fibrillation. The device is provided with two pairs...
5193536 Paced cardioversion  
A cardioverter/pacemaker which provides improved accuracy of the timing of a cardioversion pulse relative to a cardiac depolarization. After detection of a tachyarrhythmia, the device overdrives...
5191885 Method of terminating an arrhythmia  
A single use disposable esophageal electrode structure is formed with a planar sheet body member. The body member carries a plurality of spaced-apart conductive electrode members. A temperature...
5184616 Apparatus and method for generation of varying waveforms in arrhythmia control system  
An implantable device and method for providing anti-arrhythmia therapy to, and including arrhythmia in, a patient's inadequately functioning heart are disclosed. A pacemaker, defibrillator and...
5184620 Method of using a multiple electrode pad assembly  
A method of monitoring natural electrical impulses from a patient's heart, and providing appropriate therapeutic electrical impulses to a patient's heart comprising the steps of placing on the...
5184614 Implantable haemodynamically responsive cardioverting/defibrillating pacemaker  
An implantable device for the treatment of malfunctions of a patient's heart is disclosed. The device includes a first modality for sensing an electrical function in the patient's heart and...
5184615 Apparatus and method for detecting abnormal cardiac rhythms using evoked potential measurements in an arrhythmia control system  
In an implantable antiarryhythmia pacemaker, an automatic cardiac arrhythmia detection and classification monitoring apparatus and method for measuring stimulated intracardiac electrogram...
5181511 Apparatus and method for antitachycardia pacing using a virtual electrode  
An implantable device and method for treating cardiac arrhythmias in a patient's heart are disclosed. A source of antitachycardia pacing therapy and an electrode system including at least three...
5179946 Apparatus and method for arrhythmia detection by variations in the transcardiac impedance between defibrillation patches  
An implantable device for the treatment of malfunctions of a patient's heart is disclosed. The device employs defibrillation patch electrodes positioned on the outer surface of the heart generally...
5178140 Implantable medical devices employing capacitive control of high voltage switches  
An implantable device for treating a malfunctioning heart is disclosed. The device includes a high voltage circuit having a tank capacitor for storing therein during a charging mode of operation...
5176137 Apparatus for discrimination of stable and unstable ventricular tachycardia and for treatment thereof  
A method and apparatus for discriminating between stable and unstable ventricular tachycardias based on a measurement of oxygen saturation. Reference values for average oxygen saturation level and...
5163429 Hemodynamically responsive system for treating a malfunctioning heart  
A system for treating a malfunctioning heart is based on hemodynamics, the pressure at a site in a patient's circulatory system being sensed. A signal is developed representative of short term mean...
5156148 System for treating a malfunctioning heart  
A system for treating the malfunctioning heart of a patient includes means which derive at least one electrical signal from the patient's heart and means which derive at least one physiologic...
5144947 Apparatus and method for antitachycardia pacing in a arrhythmia control systems  
A method and apparatus for treating tachycardias are disclosed which utilize tachycardia cycle lengths in connection with selecting the type of antitachycardia pacing to be used in such treatment....
5119813 Mixed venous oxygen saturation responsive system for and method of treating a malfunctioning heart  
A system for and method of treating a malfunctioning heart is based on hemodynamics, the O 2 in blood at a site in a patient's circulatory system being sensed. A signal is developed representative...
5117824 Apparatus for monitoring electrical physiologic signals  
An implantable cardiac pacemaker and/or cardioverter/defibrillator employing an R-wave detector which atuomatically adjusts its sensing threshold in response to R-wave amplitude. The R-wave...
5113859 Acoustic body bus medical device communication system  
A system intended for being at least partly implanted into a living body and comprising at least two modules or devices which are interconnected by a communication transmission channel, at least...
5111815 Method and apparatus for cardioverter/pacer utilizing neurosensing  
A method and apparatus for cardioverter/pacemaking utilizing neurosensing. The invention utilizes the baroreceptor nerves found in the body. A neurosense electrode is placed around the carotid...
5111816 System configuration for combined defibrillator/pacemaker  
The present invention is directed to various features of an implantable combined defibrillation/pacemaker system. The system's defibrillation delivery circuit provides for delivery of a multi-phase...
5107850 Method and apparatus for classifying and treating cardiac arrhythmias based on atrial and ventricular activity  
A method for classifying cardiac arrhythmias by examining the atrial and ventricular activity of the heart. The atrial contraction rate and ventricular contraction rate are compared with each other...
Matches 251 - 300 out of 352 < 1 2 3 4 5 6 7 8 >