Implantable Cardioverter-Defibrillator With Post-Shock Reset
First Claim
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1. An implantable cardiac stimulus device (ICSD) comprising:
- a first electrode;
a second electrode; and
operational circuitry coupled to the first and second electrodes at first and second nodes, respectively, and configured for providing cardiac stimuli using the first and second electrodes;
wherein the operational circuitry is programmed to;
determine whether cardiac stimulus is appropriate;
when appropriate, deliver cardiac stimulus using the first and second electrodes; and
short the first and second nodes together during a predetermined time period after delivery of the cardiac stimulus.
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Abstract
In a cardioverter/defibrillator system, an electrical circuit includes an energy storage device, an output circuit for controlling delivery of pulse therapy from the energy storage device to a patient, and a sensing circuit coupled across the patient to sense the patient'"'"'s heart signal. The output circuit may be in the form of an H-bridge switching circuit wherein a pair of switches of the output circuit is simultaneously turned on to discharge residual voltage across the patient that remains after delivery of pulse therapy. Thus, interference with sensing of the patient'"'"'s heart signal is avoided.
85 Citations
20 Claims
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1. An implantable cardiac stimulus device (ICSD) comprising:
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a first electrode;
a second electrode; and
operational circuitry coupled to the first and second electrodes at first and second nodes, respectively, and configured for providing cardiac stimuli using the first and second electrodes;
wherein the operational circuitry is programmed to;
determine whether cardiac stimulus is appropriate;
when appropriate, deliver cardiac stimulus using the first and second electrodes; and
short the first and second nodes together during a predetermined time period after delivery of the cardiac stimulus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An implantable cardiac stimulus device (ICSD) comprising:
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electrode means for delivering cardiac stimulus to a patient from implanted locations;
operational circuitry coupled to the electrode means at first and second nodes, the operational circuitry configured for providing cardiac stimuli using the electrode means;
wherein the operational circuitry is programmed to;
determine whether cardiac stimulus is appropriate;
when appropriate, deliver cardiac stimulus using the electrode means; and
short the first and second nodes together during a predetermined time period after delivery of the cardiac stimulus. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. An implantable cardiac stimulus device (ICSD) comprising:
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electrode means for delivering cardiac stimulus to a patient from implanted locations;
control means for controlling delivery of the cardiac stimulus via the electrode means; and
operational circuitry coupled to the control means;
wherein the operational circuitry is programmed to;
determine whether cardiac stimulus is appropriate;
when appropriate, deliver cardiac stimulus using the electrode means; and
after delivery of cardiac stimulus, discharge residual charge on the electrode means. - View Dependent Claims (20)
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Specification