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Cardiac pacemaker system for usage in combination with an implantable cardioverter-defibrillator

  • US 9,192,774 B2
  • Filed: 06/27/2014
  • Issued: 11/24/2015
  • Est. Priority Date: 10/14/2005
  • Status: Active Grant
First Claim
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1. A method of operating a cardiac pacing system comprising:

  • performing cardiac pacing functions in at least one pacemaker in combination with a co-implanted cardioverter-defibrillator (ICD) comprising;

    delivering cardiac pacing pulses;

    sensing evoked and/or natural cardiac electrical signals;

    bidirectionally communicating among the co-implanted ICD and/or at least one pacemaker of a plurality of pacemakers;

    communicating a code that signifies occurrence of sensed cardiac electrical signals and/or delivered pacing pulses, identifying an event type and/or location;

    waiting in an atrial pacemaker for an earliest occurring event of a plurality of events comprising a sensed atrial heartbeat, a communication of a signal marking a heartbeat at a ventricular pacemaker, or timeout of an escape interval;

    responding to the sensed atrial heartbeat by generating an atrial pacing pulse signaling to at least one pacemaker of the pacemaker plurality and optionally to the co-implanted ICD that an atrial heartbeat has occurred and that encodes the atrial pacing pulse with a code signifying an atrial location and a sensed event type;

    timing a predetermined atrial-to-atrial escape interval beginning at delivery of an atrial pacing pulse;

    responding to timeout of an escape interval by delivering an atrial pacing pulse, causing an atrial heartbeat; and

    encoding the atrial pacing pulse with paced type and atrial location of an atrial heartbeat event.

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