Method and apparatus for treating cardiac arrhythmia using electrogram features
First Claim
1. A method, comprisingmonitoring a first cardiac signal across a left ventricular cardiac region;
- detecting a contraction of cardiac tissue in the left ventricular cardiac region in the first cardiac signal;
starting a coupling interval timer once the contraction of cardiac tissue is detected where the coupling interval timer counts a predetermined time period; and
delivering a defibrillation shock during the occurrence of the coupling interval time period.
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Abstract
A method and system for ventricular defibrillation by coordinating the delivery of defibrillation shocks with sensed ventricular fibrillation complexes in a way which improves the probability of success of the defibrillation shock. Ventricular electrical activity is monitored in two ventricular locations during ventricular fibrillation to detect coarse ventricular fibrillation complexes and contractions of the ventricular cardiac tissue. The defibrillation shock is delivered in coordination with the occurrence of coarse ventricular fibrillation complexes and the contractions of ventricular cardiac tissue, and specifically to occur on the up-slope portion thereof, for optimal probability of success.
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Citations
15 Claims
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1. A method, comprising
monitoring a first cardiac signal across a left ventricular cardiac region; -
detecting a contraction of cardiac tissue in the left ventricular cardiac region in the first cardiac signal; starting a coupling interval timer once the contraction of cardiac tissue is detected where the coupling interval timer counts a predetermined time period; and delivering a defibrillation shock during the occurrence of the coupling interval time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification