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EGM recording system for implantable medical device

  • US 5,776,168 A
  • Filed: 04/03/1996
  • Issued: 07/07/1998
  • Est. Priority Date: 04/03/1996
  • Status: Expired due to Term
First Claim
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1. In an implantable cardiac medical device having the capability of sensing cardiac events on a sensing lead positioned in relation with the patient'"'"'s heart and storing the electogram (EGM) of the heart in device memory in response thereto, a method of recording an EGM epoch in an oversensing condition comprising the steps of:

  • establishing oversense event criteria;

    sensing cardiac events using the sensing lead;

    establishing an oversense short interval following the sensing of a cardiac event;

    identifying cardiac events sensed using said sensing lead occurring within said oversense short interval as oversense events;

    counting oversense events to produce an oversense event count;

    comparing the oversense event count with said oversense event criteria; and

    recording an EGM epoch using said sensing lead in said device memory in response to the oversense event count meeting said oversense event criteria.

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