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Atrial tracking in an intracardiac ventricular pacemaker

  • US 10,449,366 B2
  • Filed: 09/29/2016
  • Issued: 10/22/2019
  • Est. Priority Date: 09/29/2016
  • Status: Active Grant
First Claim
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1. An intracardiac ventricular pacemaker, comprising:

  • a pulse generator configured to generate and deliver pacing pulses to a ventricle of a patient'"'"'s heart via electrodes coupled to the pacemaker;

    a motion sensor configured to produce a motion signal comprising an atrial systolic event and a ventricular diastolic event indicating a passive ventricular filling phase; and

    a control circuit coupled to the motion sensor and the pulse generator and configured to;

    set an atrial systolic event detection threshold to a first amplitude corresponding to a first amount of motion during an expected time interval of the ventricular diastolic event and to a second amplitude that corresponds to a second amount of motion and that is lower than the first amplitude after the expected time interval of the ventricular diastolic event;

    detect the atrial systolic event in response to the motion signal crossing the atrial systolic event detection threshold;

    set an atrioventricular pacing interval in response to detecting the atrial systolic event; and

    control the pulse generator to deliver a pacing pulse to the ventricle in response to the atrioventricular pacing interval expiring.

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