Method and system for monitoring heart function based on heart sound center of mass

A computer implemented method for monitoring heart function based on heart sounds (HS) in a leadless implantable medical device (IMD), the method comprising:

• obtaining, with implantable electrodes coupled to sensing circuitry, electrical cardiac activity (CA) signals, sensed at the implantable electrodes provided on the leadless IMD, over a period of time;
• obtaining HS signals, sensed by an implantable HS sensor, over the period of time;
• under control of one or more processors,
• identifying, with one or more processors of the leadless IMD, a characteristic of interest (COI) of a heartbeat from the CA signals;
• calculating, with the one or more processors, a center of mass (COM) for at least one HS based on the HS signals to obtain a corresponding at least one HS COM;
• calculating, with the one or more processors, at least one of a therapy-related (TR) delay or a sensing-related (SR) blanking interval (BI) based on the at least one HS COM;
• and
• delivering therapy or sensing additional CA signals with the electrodes based on the at least one of the TR delay or the SR BI calculated based on the at least one HS COM.