Atrial tracking in an intracardiac ventricular pacemaker

A non-transitory computer-readable medium storing a set of instructions which when executed by a control circuit of a pacemaker having a motion sensor, cause the pacemaker to:

• sense a motion signal;
• determine from the motion signal a timing of a ventricular diastolic event;
• start a time period having an expiration time set based on the timing of the ventricular diastolic event;
• detect an atrial systolic event from the motion signal after the expiration time of the time period;
• and
• generate a first pacing pulse in response to detecting the atrial systolic event detection.

A method comprising:

• sensing a motion signal;
• determining from the motion signal a timing of a ventricular diastolic event;
• starting a time period having an expiration time set based on the timing of the ventricular diastolic event;
• detecting an atrial systolic event from the motion signal after the expiration time of the time period;
• and
• generating a first pacing pulse in response to detecting the atrial systolic event detection.