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6311088 |
Dual-chamber pacemaker with optimized PVARP following event that may disrupt AV synchrony
A pacemaker and a method of employing a pacemaker to pace a patient's heart. The method of operation of the pacemaker includes defining a post ventricular atrial refractory period having a first...
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6292695 |
Method and apparatus for transvascular treatment of tachycardia and fibrillation
The present invention provides a method of controlling cardiac fibrillation, tachycardia, or cardiac arrhythmia by the use of an electrophysiology catheter having a tip section that contains at...
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6292691 |
Atrial defibrillation methods and apparatus
Methods and apparatus for achieving atrial defibrillation in a heart. Atrial pacing is first conducted from multiple pacing sites in an independent (asynchronous) manner so as to have the desired...
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6285906 |
Muscle contraction assist device
A method and apparatus for controlling a segment of excitable tissue, typically tissue of a heart, the segment having an intrinsic activity level. During a high phase, electrical energy of a given...
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6275732 |
Multiple stage morphology-based system detecting ventricular tachycardia and supraventricular tachycardia
A system for detecting ventricular tachycardia and supraventricular tachycardia using a multiple stage morphology based system. Cardiac signals are sensed from a patient's heart and analyzed for...
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6256537 |
Pacemaker system with inhibition of AV node for rate regulation during atrial fibrillation
There is provided a system for regulating ventricular rate in the presence of abnormally high atrial rates, e.g., during episodes of atrial fibrillation. During such an episode, the system,...
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6205357 |
Methods and apparatus for detecting and treating medical conditions of the heart
An implantable system for detecting electrical activity from a patient's heart comprises a first sensing electrode configured for positioning through the coronary sinus ostium and within a vein on...
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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...
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6192274 |
Two-chamber pacemaker
Two-chamber pacemaker (100), comprising atrium sensing means (EA, 107) as well as ventricle sensing means (EV, 105) and refractory switching means (100B) for influencing the processing of output...
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6185459 |
Method and apparatus for prevention of atrial tachyarrhythmias
A cardiac pacemaker and a method of its use. The pacemaker paces a patient's heart in a tachyarrhythmia prevention pacing mode for an extended time period, defines a metric of success of the...
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6181966 |
Heart therapy apparatus with therapy correction means
A heart therapy apparatus (1) with detection means (3, 5, 9) for detecting a physiological parameter that characterizes the state of the heart/circulatory system, with comparison value storage...
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6167308 |
Closed loop ATP
An implantable anti-tachycardia pacemaker having the capability of switching from a first pacing regimen to a second pacing regimen, without waiting to determine whether the first pacing regimen...
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6161041 |
Pacemaker system with diurnal pattern controlled overdrive for prevention of tachycardia
There is provided a cardiac pacemaker system with a ventricular tachycardia prevention feature, whereby the pacemaker monitors ventricular activity during each patient awakening period to determine...
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6141586 |
Method and apparatus to allow cyclic pacing at an average rate just above the intrinsic heart rate so as to maximize inotropic pacing effects at minimal heart rates
Method and apparatus for cyclic ventricular pacing starting at a rate just above the intrinsic atrial firing rate (overdrive pacing), followed by relaxation to a rate just below the intrinsic...
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6134469 |
Implantable heart stimulator
An implantable cardioverter-defibrillator and/or heart pacemaker has a programmable electrical circuit for producing series of stimulation impulses, wherein electrical circuit is able, on detection...
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6134470 |
Method and apparatus for treating a tachyarrhythmic patient
An implantable anti-arrhythmia system which includes a spinal cord stimulator and an implantable heart rhythm monitor, coupled to control the spinal cord stimulator. The implantable heart monitor...
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6101414 |
Method and apparatus for antitachycardia pacing with an optimal coupling interval
An implantable defibrillator includes a coupling interval generator for defining a coupling interval as a dynamic function of the VT interval. The coupling interval is determined based on a...
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6091991 |
Method providing atrial anti-tachyarrhythmia therapy
The device provides anti-tachyarrhythmia therapy, such as a countershock, to an atrium needing treatment, but delays its delivery for a programmable period of time following an indication of...
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6078836 |
Active implantable medical device for the reduction of cardiac arrhythmias by modifying the escape interval and methods therefor
An active implantable medical device, especially of the cardiac pacemaker, defibrillator and/or cardiovertor type, and method for the reduction of episodes of arrhythmia, and especially of atrial...
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6078837 |
Method and apparatus for treatment of fibrillation
A cardiac stimulator and a method of its use. The stimulator includes a lead system carrying a stimulation electrodes adapted to be located at multiple sites adjacent tissue of a patient's heart...
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6058328 |
Implantable stimulation device having means for operating in a preemptive pacing mode to prevent tachyarrhythmias and method thereof
Preemptive tachyarrhythmia pacing is provided in an implantable cardiac-stimulation device, such as an implantable pacemaker or defibrillator, by modifying the operation of the implantable device...
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6047213 |
Atrial tracking cardiac stimulator
A atrial tracking cardiac stimulator for detecting atrial activations of a heart through an atrial lead associated with at least one of the atria of the heart and delivering ventricular pacing...
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5994880 |
Giant magnetroresistive ratio sensing system
A magnetic sensing circuit is arranged in cooperative relation to a flyback transformer in a capacitor charging circuit for directly sensing the state of the transformer magnetic field for...
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5995871 |
System and method for cardioversion using scan stimulation
A method and system for applying therapeutic electrical pulses to the heart includes a plurality of spaced apart electrodes. Each electrode in electrical communication with a pulse generator and...
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5991660 |
Cardiac pacing methods
The described method of treatment relates to the field of cardiovascular disease and is a cure for various forms of heart fibrillation. The method consists of sectioning the heart into independent...
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5991656 |
Prioritized rule based apparatus for diagnosis and treatment of arrhythmias
An implantable antiarrhythmia device which detects and classifies arrhythmias of the human heart, and delivers appropriate therapy. The device employs a method of arrhythmia classification based on...
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5978708 |
Detection and confirmation of cross-sensing phenomenon in active implantable medical devices
An active implantable medical device, especially of a cardiac pacemaker, defibrillator and/or cardiovertor type, having a dual chamber stimulation function and protection against cross-sensing...
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5978709 |
Pacemaker system with improved techniques for preventing and suppressing atrial arrhythmias
There is provided a pacing system having special functions for treating the patient's atrium with atrial pacing so as to reduce the probability of occurrence of dangerous atrial arrhythmias. The...
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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...
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5951593 |
Apparatus for preventing atrial fibrillation using precursors
An implanted pacemaker senses intrinsic atrial events and generates corresponding pacing pulses. The atrial events are also monitored for a precursor of an atrial fibrillation episode. If such a...
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5931857 |
Method and apparatus for diagnosis and treatment of arrhythmias
An implantable anti-arrhythmia device such as a defibrillator or anti-tachycardia pacemaker with an associated patient activator. The arrhythmia detection function is divided between the patient...
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5928271 |
Atrial anti-arrhythmia pacemaker and method using high rate atrial and backup ventricular pacing
An atrial and ventricular pacemaker including an atrial pulse generator having the capability of delivering high rate atrial pacing pulses for electrophysiologic study and having the capability of...
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5925066 |
Atrial arrythmia sensor with drug and electrical therapy control apparatus
An atrial arrythmia sensor and drug dispensing apparatus is disclosed. The apparatus comprises a multiphase, multistage intelligent system to monitor and treat atrial fibrillation. The apparatus...
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5916239 |
Method and apparatus using vagal stimulation for control of ventricular rate during atrial fibrillation
A closed-loop, variable-frequency, vagal-stimulation apparatus for control of ventricular rate during atrial fibrillation. In one embodiment the apparatus includes a stimulator applied to the left...
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5913879 |
Venous pooling detection and therapy device
An implantable detection and therapy device allow prediction of the vasovagal syncope for use in administering therapy to a subject, the therapy including pacing pulses or drug delivery, or a...
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5897575 |
Arrhythmia classification system with reliability indication that allows for low quality input signals in pacemakers
An implantable cardiac device wherein a reliability indicator is developed for cardiac classification based on the presence or absence of noise. If the classification is unreliable a robust therapy...
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5893882 |
Method and apparatus for diagnosis and treatment of arrhythmias
A pacemaker provided with a mode switching feature adapted to stabilize ventricular heart rate during atrial fibrillation. In a preferred embodiment of the invention, the device nominally operates...
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5882352 |
Automatic adjustment of detection rate threshold in an implantable antitachycardia therapy device
An antitachycardia stimulation device that automatically adjusts its detection rate threshold as a function of a sensed physiological parameter indicative of cardiac rate. The implantable...
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5876422 |
Pacemaker system with peltier cooling of A-V node for treating atrial fibrillation
There is provided a cardiac pacing system for dealing with dangerous atrial arrhythmias, wherein when an episode of such an arrhythmia is detected, the system operates to cool the A-V node so as to...
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5873896 |
Cardiac device for reducing arrhythmia
A device is disclosed for reducing the likelihood of cardiac arrhythmia or halting the arrhythmia after it begins without having to give a large shock which can be painful or may damage the heart....
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5873897 |
Method and apparatus for dual chambered tachyarrhythmia classification and therapy
A method and apparatus for classifying and treating tachyarrhythmias. A cardiac stimulator includes an algorithm that uses dual chamber sensing to determine the type of tachyarrhythmia detected. If...
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5871511 |
Implantable apparatus for the early diagnosis and suppression of tachycardia in the heart
An implantable apparatus for the early diagnosis of tachycardia in the heart is provided with a microelectrode array, which is in contact with the cardiac muscle tissue, for detecting stimulus...
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5865838 |
Low energy implantable atrial defibrillator using multiple electrodes and stimulation rates
In an apparatus for terminating atrial fibrillation using pulses having an energy content which is the same as the energy content of conventional pacing pulses, stimulation pulses are respectively...
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5846263 |
Apparatus for diagnosis and treatment of arrhythmias
An implantable pacemaker employing an arrhythmia prevention pacing modality particularly optimized for inclusion in dual chamber pacemakers and anti-arrhythmia devices which include dual chamber...
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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...
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5836985 |
Method for treating abnormal arial or ventricular activity
The described method of treatment relates to the field of cardiovascular disease and is a cure for various forms of heart fibrillation. The method consists of sectioning the heart into independent...
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5836971 |
Dynamic rezoning of a tiered therapy inplantable cardioverter defibrillator/pacemaker (ICD) device
An implantable cardioverter/defibrillator/pacemaker (ICD) device having tiered level therapies, detects an arrhythmia through an electrode adapted to be coupled to a patient's heart. An output...
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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...
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5814085 |
Rate stabilization pacemaker
A cardiac pacemaker with a rate stabilization pacing mode. The pacemaker varies the increment following a cycle ending in a sensed depolarization as a function of the underlying heart rate and may...
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5814079 |
Cardiac arrhythmia management by application of adnodal stimulation for hyperpolarization of myocardial cells
An anodal stimulation method and apparatus for the prevention or treatment of tachyarrhythmias using anodal stimulation (AS) energy for effecting hyperpolarization of myocardial cells of a heart...
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