Patent ID: 9554714
Date: 2017-01-31
CPC Classifications: A61B,A61N

Claim:
1. A method of operation in an implantable cardiac system comprising a plurality of electrodes coupled to operational circuitry configured to analyze cardiac signals, the method comprising: the operational circuitry detecting a first cardiac event by comparing a cardiac signal received from the electrodes to a detection threshold, the detection threshold being defined by a detection profile chosen from at least first and second detection profiles, with the second detection profile having lesser sensitivity to cardiac signals than the first detection profile; the operational circuitry detecting a close call after the first cardiac event, in which the close call is detected by applying a set of close call rules including a first rule in which: the operational circuitry determining that a close call has occurred in response to the set of close call rules being met, including finding that at least the first rule has been met, and, in response to determining that a close call has occurred, selects the second detection profile for use in detecting at least one cardiac event.