Scanning burst tachycardia control pacer
First Claim
1. A tachycardia control pacer comprising means for confirming tachycardia, means responsive to each operation of said confirming means for generating a burst of heart stimulating pulses at a constant rate, and means for controlling successive heart stimulating pulse bursts to be generated at different constant rates.
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Abstract
There is disclosed an improved pacer for controlling tachycardia. Following each tachycardia confirmation, a burst of a programmed number (e.g., 15) of stimulating pulses is generated. The rates of the bursts increase from cycle to cycle; thus following each tachycardia confirmation, a pulse burst at a different rate is generated. The rate of a burst which is successful in terminating tachycardia is stored, and following the next tachycardia confirmation the stored rate is used for the first burst which is generated. In this manner, there is a greater likelihood that tachycardia will be terminated following the first burst since a previously successful rate is used. Only if success is not achieved does scanning of the burst rate ensue, starting with the previously successful rate.
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Citations
54 Claims
- 1. A tachycardia control pacer comprising means for confirming tachycardia, means responsive to each operation of said confirming means for generating a burst of heart stimulating pulses at a constant rate, and means for controlling successive heart stimulating pulse bursts to be generated at different constant rates.
- 41. A tachycardia control pacer comprising means for confirming tachycardia, means responsive to said confirming means for generating a burst of at least three heart-stimulating pulses at a constant rate which potentially allows tachycardia to be terminated, means for scanning said rate during successive cycles of operation of said pulse burst generating means, means for detecting tachycardia termination, said pulse burst generating means ceasing to operate following tachycardia termination, and means for registering the last-used pulse rate which was successful in terminating tachycardia for first use in the next scan which follows tachycardia confirmation.
Specification