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5105810 |
Implantable automatic and haemodynamically responsive cardioverting/defibrillating pacemaker with means for minimizing bradycardia support pacing voltages
An implantable, battery-operated cardioverting/defibrillating pacemaker device with the ability to sense and respond to haemodynamic compromise is described. The ventricular pressure (VP) and...
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5086772 |
Arrhythmia control system employing arrhythmia recognition algorithm
An arrhythmia control method and device are disclosed which monitor the cardiac state of a patient, utilize an arrhythmia recognition algorithm to detect and distinguish among bradycardia, sinus...
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5085213 |
Hemodynamically responsive system for and method of treating a malfunctioning heart
A system for a method of treating a malfunctioning heart is based on hemodynamics, the pressure in the right side of a patient's circulatory system being sensed. A first signal is developed...
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5080099 |
Multi-pad, multi-function electrode
An electrode having multiple conductive polymer pads for performing multiple, electrical physiological functions from a single set of electrodes with respect to a patient at or about the same time,...
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5080097 |
Combination pacer defibrillator electrodes and pacer-defibrillator and method for use therewith
A single paddle is capable of delivering pacing and defibrillating electrical pulses to a patient. In one embodiment, the paddle has a region of high electrical conductivity coupled to a...
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5078134 |
Portable device for sensing cardiac function and automatically delivering electrical therapy
A patient-worn harness or vest protects at-risk patients from the possibly fatal results of heart arrhythmias. The harness or vest incorporates sensing electrodes for monitoring heart condition, a...
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5074301 |
Apparatus and method for atrial pace before ventricular shock in dual chamber arrhythmia control system
An apparatus and method for tachyarrhythmia reversion provides a pacing pulse to the atrium at a predetermined time prior to the delivery of a cardioversion shock to the ventricle. The pacing pulse...
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5063928 |
Apparatus and method for detecting and treating cardiac tachyarrhythmias
An arrhythmia control system and method having automatic determination of the tachycardia confirmation interval. The interval is dynamically set at the minimum of an absolute detection interval and...
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5048521 |
Method for combined cardiac pacing and defibrillation
A method is disclosed for combined cardiac pacing and defibrillating with an implanted pacer/defibrillator having sensing and pacing leads connected to the atrium and the ventricle. P-waves and...
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5044367 |
Method and apparatus for switching cardiac stimulation signals
Cardiac stimulation signals are routed through a switching network to select only one cardiac stimulation signal as an output signal. The selected output signal may be routed to one of two patient...
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5042497 |
Arrhythmia prediction and prevention for implanted devices
A system for predicting and preventing cardiac arrhythmias for use in combination with an implanted arrhythmia treatment device comprising means for sensing the neural activity of a patient and...
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5033467 |
Combined defibrillator pacer system utilizing pacer tip lead switch
A switch for placement in the lead line connecting a pacing pulse generator to an implanted pacing tip electrode in a combined implantable pacing-defibrillation system. The switch is triggered by...
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5014698 |
Method of and system for monitoring and 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...
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5007422 |
Method for combiner cardiac pacing and defibrillation
A method is disclosed for combined cardiac pacing and defibrillating with an implanted pacer/defibrillator having sensing and pacing leads connected to the atrium and the ventricle. P-waves and...
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5002052 |
System and method for detection and treatment of ventricular arrhythmias
A method for detecting and treating ventricular tachyrhythmias of a patient's heart includes the steps of selectively dividing the heart rate continuum into regions including at least two classes...
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4998974 |
Apparatus and method for antitachycardia pacing in dual chamber arrhythmia control system
Apparatus and method of antitachycardia pacing in a duel chamber pacing device including means for or steps of detecting the presence of a tachycardia, measuring the tachycardia cycle length,...
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4989602 |
Programmable automatic implantable cardioverter/defibrillator and pacemaker system
A non-programmable automatic implantable cardioverter/defibrillator (AICD) capable of providing programmable thresholds for triggering high energy stimulation pulse(s) from the AICD is coupled to...
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4989603 |
Implantable cardiac defibrillator employing a switched capacitor filter stage having a low charge-injection induced offset voltage
An implantable cardiac defibrillator employing a switched capacitor filter stage having charge steering resistors connected in series with corresponding switched capacitors that are coupled to a...
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4972835 |
Implantable cardiac defibrillator employing an improved sensing system with non-binary gain changes
An implantable cardiac defibrillator includes electrodes coupled to a patient's heart, a sensing system having inputs connected to the electrodes for sensing cardiac electrical signals from the...
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4971058 |
Cardiac therapy method with duration timer
A cardiac therapy method with duration timer is disclosed, using an implanted cardiac pulse generator. A patient's heartbeat is sensed and the intervals between heartbeats are averaged. The number...
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4969465 |
Cardiac therapy method
A cardiac therapy method is disclosed, using an implanted cardiac pulse generator. A patient's heartbeat is sensed and the intervals between heartbeats are averaged. The number of temporary storage...
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4967748 |
O.sub.2 level 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...
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4960123 |
Differentiating between arrhythmia and noise in an arrhythmia control system
A method and apparatus for differentiating between arrhythmia and noise in an antiarrhythmia device. A noise detection criteria is applied to a detected signal so as to detect noise simultaneously...
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4949719 |
Method for cardiac defibrillation
A method for cardiac defibrillation is described, for use with an implanted defibrillator. A patient's R-waves are sensed to detect the R-R intervals. If an arrhythmia is detected, the charging of...
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4940054 |
Apparatus and method for controlling multiple sensitivities in arrhythmia control system including post therapy packing delay
An apparatus and method for tachyarrhythmia reversion uses multiple sensitivities programmed for automatic operation. A first (medium) sensitivity is used normally for the detection of sinus rhythm...
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4895151 |
Apparatus and method for therapy adjustment in implantable
Apparatus and method for treating tachyarrhythmias wherein the presence of a patient tachyarrhythmia is detected and a first antitachyarrhythmia therapy (antitachycardia pacing) is given at a first...
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4869252 |
Apparatus and method for controlling pulse energy in antitachyarrhythmia and bradycardia pacing device
An apparatus and method for controlling pulse energy in an arrythmia control device wherein bradycardia pacing pulses are normally delivered at a first energy, and after antitachycardia therapy,...
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4865036 |
Antitachyarrythmia pacemaker using pre-ejection period to distinguish physiologic from pathologic tachycardia
A cardiac stimulator apparatus for effecting cardioversion or defibrillation in the event of pathologic tachycardia or ventricular fibrillation in which the rate of heart depolarization signals is...
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4860749 |
Tachycardia detection for automatic implantable cardioverter/defibrillator with atrial and ventricular sensing capability
An automatic tachycardia detection assembly to be implanted in a person for stimulating the heart upon detection of abnormal tachycardias. The assembly includes an atrial sensor (16) and...
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4830006 |
Implantable cardiac stimulator for detection and treatment of ventricular arrhythmias
An implantable cardiac stimulator integrates the functions of bradycardia and anti-tachycardia pacing-type therapies, and cardioversion and defibrillation shock-type therapies. The stimulator is...
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4827936 |
Apparatus for stimulating the heart with protected pacer
A combination two-channel defibrillator and programmable pacing stimulator for assesses lethal ventricular tachyarrhythmias and determine defibrillation thresholds during implantable defibrillator...
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4819643 |
Method and apparatus for cardioverter/pacer featuring a blanked pacing channel and a rate detect channel with AGC
The implantable cardioverter/pacer includes a pacer channel and a rate detect channel both receiving a cardiac signal representative of the ECG of patient. The pacing channel issues a pacing signal...
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4817608 |
Cardioverting transvenous catheter/patch electrode system and method for its use
Disclosed are an electrode configuration and a method for its use with an automatic implantable cardioverter/defibrillator. The electrode configuration includes a catheter electrode intravenously...
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4790317 |
Apparatus for recognition and termination of ventricular tachycardia and ventricular fibrillation
For automatic recognition of ventricular tachycardia and ventricular fibrillation, pulse sequences are compared which are obtained when sensing at at least one position on each ventricular...
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4787389 |
Using an implantable antitachycardia defibrillator circuit
A cardiac stimulation apparatus is provided which includes an implantable cardiac pacer 10 having an antitachycardia circuit 12 and an implantable defibrillator circuit 58. The patient's electrical...
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4735206 |
Method and apparatus for defibrillating and pacing the heart
When the heart is in ventricular fibrillation, the heart cells that stimulate the heart muscles produce rapid repetitive excitation without coordinated contraction of the ventricle. There is no...
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4705043 |
Electrophysiology study system using implantable cardioverter/pacer
An electrophysiology (EP) study system using an implantable cardioverter/pace. The system includes an implantable unit having a conventional programmable pace capable of operation in at least the...
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4693253 |
Automatic implantable defibrillator and pacer
A defibrillator/pacer having separate energy storage circuits for pacing and defibrillating. The pacing energy storage is charged from residual energy from the defibrillator source to permit high...
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4662377 |
Cardioverting method and apparatus utilizing catheter and patch electrodes
A novel electrode apparatus and method for use with an automatic implantable cardioverter/defibrillator. The electrode apparatus includes a catheter electrode intravenously positioned within the...
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4635639 |
Modular physiological instrument
A physiological instrument that includes a first component comprising an ECG monitor and a second component comprising a defibrillator. The second component may also include a pacemaker mounted to...
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4628935 |
Defibrillator adapted for use with accessory cassettes
A defibrillator adapted for use with accessory cassettes. In one embodiment, the defibrillator comprises a body, a pair of electrodes, means for mounting the electrodes to the body, means for...
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4625730 |
Patient ECG recording control for an automatic implantable defibrillator
An implantable automatic defibrillator includes sensors which are placed on or near the patient's heart to detect electrical signals indicative of the physiology of the heart. The signals are...
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4548209 |
Energy converter for implantable cardioverter
An implantable medical device to deliver cardioverting energy to cardiac tissue in synchrony with detected ventricular depolarizations having a DC-DC flyback converter. The primary coil of the...
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4440172 |
Apparatus for combining pacing and cardioverting functions in a single implanted device
The invention relates to an apparatus for combining pacing and cardioverting functions in a single implanted device, circuitry being provided not only to interface the defibrillator to the ECG...
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4407288 |
Implantable heart stimulator and stimulation method
An implantable heart stimulator and related method calls for the determination of a given heart condition from among a plurality of conditions, the selection of at least one mode of operation for...
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4303075 |
Method and apparatus for maximizing stroke volume through atrioventricular pacing using implanted cardioverter/pacer
A method and apparatus for maximizing stroke volume through atrioventricular pacing using an implanted cardioverter/pacer accomplishes AV pacing with an AV delay tailored to the particular patient,...
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4114628 |
Demand pacemaker with self-adjusting threshold and defibrillating feature
A implantable ventricular stimulating, ventricular sensing, inhibited heart pacer providing electronically generated stimulating pulses of varying energies depending upon the heart response. The...
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4030509 |
Implantable electrodes for accomplishing ventricular defibrillation and pacing and method of electrode implantation and utilization
Disclosed are several embodiments of an electrode system for ventricular defibrillation, and the methods of using and implanting the electrode system. In one embodiment, the electrodes are in a...
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3866615 |
Portable electronic cardiac stimulator
A light weight portable electronic cardiac emergency stimulator which includes separate defibrillation and pacemaking electronic circuits and a self-contained battery pack. The defibrillation and...
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3716059 |
CARDIAC RESUSCITATOR
A resuscitator apparatus includes means for detecting and counting the electrical and mechanical output of the heart of a suspected heart attack victim, and means for substantially immediately...
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