Synchronous intracardiac cardioverter
First Claim
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1. An implantable medical device for the electrical termination of tachyarrhythmia comprising:
- sensing means responsive to cardiac depolarizations for producing a sense signal indicative of naturally occurring cardiac activity;
detection means responsive to said sensing means for detecting cardiac tachyarrhythmia for producing a tachyarrhythmia signal indicative of such tachyarrhythmia;
pulse generator means responsive to a stimulus signal for delivering a cardioverting pulse to cardiac tissue in response to said stimulus signal;
stimulus signal generating means responsive to said detection means for generating an output stimulus signal concurrent with each detected depolarization; and
means for ensuring that the cardioverting pulse is delivered to cardiac tissue concurrent with a detected ventricular depolarization of the cardiac tissue.
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Abstract
An implantable medical device to deliver cardioverting energy to cardiac tissue in synchrony with detected ventricular depolarizations. The energy renders refractory, areas of the heart associated with a reciprocating or automatic tachycardia, thus reverting these tachyarrhythmias to normal sinus rhythm without the risk of stimulating the heart during the vulnerable portion of repolarization.
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Citations
2 Claims
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1. An implantable medical device for the electrical termination of tachyarrhythmia comprising:
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sensing means responsive to cardiac depolarizations for producing a sense signal indicative of naturally occurring cardiac activity; detection means responsive to said sensing means for detecting cardiac tachyarrhythmia for producing a tachyarrhythmia signal indicative of such tachyarrhythmia; pulse generator means responsive to a stimulus signal for delivering a cardioverting pulse to cardiac tissue in response to said stimulus signal; stimulus signal generating means responsive to said detection means for generating an output stimulus signal concurrent with each detected depolarization; and means for ensuring that the cardioverting pulse is delivered to cardiac tissue concurrent with a detected ventricular depolarization of the cardiac tissue. - View Dependent Claims (2)
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Specification