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7512441 |
Autocapture pacing/sensing configuration
A cardiac electrical stimulation system that enhances the ability of the system to automatically detect whether an electrical stimulus results in heart capture or contraction. The cardiac...
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7184833 |
Multiple pacing output channels
An implantable medical device includes two or more pacing output channels coupled to a single unipolar electrode or bipolar electrode pair. The implantable medical device can control each pacing...
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7162298 |
Devices for detecting the presence of cardiac activity following administration of defibrillation therapy
The present invention provides systems, methods and computer program products for detecting the presence of cardiac activity in a patient. The present invention includes a detector circuit that is...
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7092756 |
Autocapture pacing/sensing configuration
A cardiac pacing system that enhances the ability of a cardiac pacer to automatically detect whether a pacing stimulus results in heart capture or contraction. The cardiac pacing system includes a...
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6731981 |
Heart stimulator for administering antithrombus therapy
A heart stimulator has a stimulation energy delivering assembly, including at least one lead adapted for implantation in contact with cardiac tissue, and an atrial arrhythmia detector, and a...
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6473649 |
Rate management during automatic capture verification
An implantable cardiac rhythm management device capable of automatically detecting intrinsic and evoked response of a patient's heart and suitable for use during capture verification. The device of...
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6337996 |
Active implantable medical devices with refractory period management
An active implantable medical device with a sophisticated management of the refractory periods. Such devices typically include a detection circuit and a stimulation circuit and a circuit which...
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6324425 |
Recharge circuitry for multi-site stimulation of body tissue
Multi-chamber cardiac pacing systems for providing multi-site pacing to at least one of the right and left atria and then synchronously to the right and left ventricles in a triggered pacing...
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6238421 |
Induction heating device and method for metallic implants in living beings
A system and method for heating cells surrounding metallic implants in living beings. The system includes a metallic implant within the living being, surrounded by the cells to be heated, an...
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6067472 |
Pacemaker system and method with improved evoked response and repolarization signal detection
There is provided a pacemaker system with capture verification and threshold testing, in which the pacemaker adjusts the post-stim pulse portion of a triphasic pulse to minimize polarization, and...
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6044296 |
Pacing output coupling capacitor for automatic capture threshold detection in cardiac pacing systems
A method and apparatus for attenuating polarization voltages or "afterpotentials" which develop at the heart tissue/electrode interface following the delivery of a pacing stimulus to the heart...
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6016446 |
Cardiac rhythm management system including nonlinear, non-blanking sense amplifier
A cardiac rhythm management system provides a nonlinear gain characteristic. The system operates without blanking switches that decouple its inputs from electrodes during delivery of a pacing or...
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5941903 |
Pacemaker for detection of evoked response
A method and apparatus for attenuating polarization voltages or "afterpotentials" which develop at the heart tissue/electrode interface following the delivery of a pacing stimulus to the heart...
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5843136 |
Pacing output circuitry for automatic capture threshold detection in cardiac pacing systems
A method and apparatus for attenuating polarization voltages or "afterpotentials" which develop at the heart tissue/electrode interface following the delivery of a pacing stimulus to the heart...
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5741310 |
System and method for hemodynamic pacing in ventricular tachycardia
A system and method for providing a 1:2 pacing therapy in response to a sensed ventricular tachycardia, which results in an improved hemodynamic response while limiting the potential for...
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5690683 |
After potential removal in cardiac rhythm management device
An apparatus effectively removes after potential occurring after a electrical pulse is delivered in a cardiac rhythm management system such as a pacemaker system or cardioverter/defibrillator...
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5609611 |
Pacemaker system with porous electrode and residual charge or after-potential reduction
A cardiac pacemaker system is provided which includes a stimulation electrode adapted for being anchored in the heart. An output capacitor is coupled to the stimulation electrode. A first circuit...
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5601608 |
Methods and apparatus for applying charge-balanced antiarrhythmia shocks
Methods and apparatus are provided for generating multiphasic charge-balanced cardioversion and defibrillation shocks to apply to a patient's heart to terminate episodes of arrhythmia such as...
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5486201 |
Active discharge of a coupling capacitor in an implantable medical device
An active discharge circuit for use within an implantable medical device, such as a pacemaker, rapidly discharges a coupling capacitor connected between a therapy circuit and body tissue. The...
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5470342 |
Adaptive refractory period within implantable cardioverter-defibrillator
An implantable cardioverter-defibrillator (ICD) adaptively adjusts the refractory period and sensitivity setting of its sensing channel in order to optimally detect depolarization signals...
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5312448 |
Medical appliance for stimulating tissue contractions
An appliance for electrically stimulating tissue contractions of a living organism has circuitry for applying a stimulation potential to the tissue region to be stimulated and for applying a...
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5285780 |
Pacemaker with improved pulse detection
Disclosed is a pacemaker having an output circuit which is set to a high impedance when the potential of the input signal transmitted through the input-output terminal is within a predetermined...
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5172690 |
Automatic stimulus artifact reduction for accurate analysis of the heart's stimulated response
An apparatus adapted to be implanted in a patient for electrically stimulating the heart and analyzing the heart's stimulated response, and a method of operating the apparatus, are disclosed. The...
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5165405 |
Apparatus for tissue stimulation
In the stimulation of living tissue the reaction thereof is usually superimposed with polarization phenomena to such a degree that the reaction cannot be recognized in the electrical signal. To...
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5165404 |
Biological tissue stimulation device with control means for determining stimulation sensitivity calculation timing
A device for biological tissue stimulation continually undertakes an evaluation of the stimulation sensitivity of the biological tissue to be stimulated, so that the stimulation energy can be set...
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4991583 |
Pacemaker having independently programmable electrode configuration for pacing and sensing and method for operation thereof
A pacemaker and a method of operation thereof are provided for configuring or operating a conventional pacemaker having a plurality of lead electrodes. Each lead can be independently configured for...
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4969467 |
Pacemaker with improved automatic output regulation
A pacemaker which is provided with an improved automatic regulation circuit which is capable of distinguishing between a fashion beat and loss of capture. The failure to sense an evoked potential...
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4903700 |
Pacing pulse compensation
A pacemaker which generates a triphasic stimulus; the first and third phases are positive pulses, and the second is the negative stimulus. After-potentials are so low that reliable sensing of...
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4895152 |
System for cardiac pacing
A system is provided for cardiac pacing, in which the output levels of the electrical stimulus pulses are responsive to the detection or non-detection of cardiac pacer evoked potentials. A pulse...
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4858610 |
Detection of cardiac evoked potentials
Automatic detection of cardiac pacer evoked potentials may be obtained through a cardiac pacer lead positioned in a heart chamber. An electrical stimulus is emitted in unipolar mode from a first...
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4811738 |
Cardiac pacemaker circuit with fast stored charge reduction
A cardiac pacemaker circuit for use with a stimulating electrode embedded in a patient's atrium or ventricle and a reference electrode positioned outside the heart or on the same lead within the...
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4766901 |
Rate responsive pacing system using the integrated evoked potential
A rate responsive cardiac pacing system is provided. In the illustrative embodiment, electrical stimulus pulses are applied to the heart ventricle and the evoked potential of the applied electrical...
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4762136 |
Low polarization pacing electrodes for capture verification
An electrode for use in cardiac pacing has a substrate composed of a material conventionally employed for pacing electrodes, and a surface layer or film of iridium oxide overlying the substrate....
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4759367 |
Rate responsive pacing using the magnitude of the repolarization gradient of the ventricular gradient
A rate responsive cardiac pacing system is provided. In the illustrative embodiment, electrical stimulus pulses are applied to the heart ventricle and the evoked potential of the applied electrical...
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4759366 |
Rate responsive pacing using the ventricular gradient
A rate responsive cardiac pacing system is provided. In the illustrative embodiment, electrical stimulus pulses are applied to the heart ventricle and the evoked potential of the applied electrical...
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4637397 |
Triphasic wave defibrillation
Method and apparatus for stimulation of cells in arrhythmic myocardial tissues includes depolarizing the cells by application of a first electrical pulse or shock followed by a second electrical...
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4579119 |
Method and apparatus for multiplexed dipole/quadrupole for stimulation/sensing
A system is provided for cardiac pacing and sensing. A lead carrying three electrodes is introduced into a cardiac chamber. Two of the electrodes are connected to the output of a pulse generator...
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4543956 |
Biphasic cardiac pacer
A biphasic cardiac pacer is provided having a novel system for detecting the evoked response from the heart after a stimulating pulse is applied. A relatively short, high absolute amplitude...
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4498478 |
Apparatus for reducing polarization potentials in a pacemaker
A method and apparatus embodied in a pacemaker for attenuating polarization currents or voltages at the output terminals of the pulse generator. A heart pacemaker typically possesses a source of...
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4406286 |
Fast recharge output circuit
A body implantable stimulator having an output capacitance that is periodically charged to a predetermined energy level and discharged through an electrode coupled to body tissue. The discharge...
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4373531 |
Apparatus for physiological stimulation and detection of evoked response
A physiological stimulating system includes improved means for minimizing the polarization that results at the stimulus site, thereby enabling enhanced detection of evoked responses. In the...
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4343312 |
Pacemaker output circuit
A physiological stimulating system includes improved means for minimizing the polarization that results at the stimulus site, thereby enabling enhanced detection of evoked responses. In the...
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4170999 |
Demand pacer having reduced recovery time
In a demand pacer, an input amplifier senses stimulating pulses and natural heart beat signals, and responsively thereto establishes control of a subsequent stimulating pulse. Charge accumulation...
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4144892 |
Cardiac pacer and monitor system
A pacer for cardiac pacing and condition monitoring in which the electrical characteristics of the pacer are altered upon a temporary or permanent charge in monitored conditions, such as the...
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4114627 |
Cardiac pacer system and method with capture verification signal
A cardiac pacer system includes a pulse generator for generating a stimulating signal coupled through an output coupling capacitor to a single heart-engaging electrode. An amplifier is coupled to...
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4055189 |
Condition monitoring pacer
A pacer for cardiac pacing and condition monitoring wherein the electrical characteristics of the pacer are altered upon a temporary or permanent change in monitored conditions, such as loss of...
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3835865 |
BODY ORGAN STIMULATOR
The output circuit of an electric stimulator is connected to an organ such as the heart through a coupling capacitor. A semiconductor switch is triggered with a short pulse so that it partly...
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3563247 |
BIDIRECTIONAL HEART STIMULATOR
An implantable electronic heart stimulator has a coupling capacitor in series with the subject's heart to which it is electrically connected. Electronic switches sequentially apply a pulse of one...
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