Patent ID: 7662104

Claim:
A system comprising: a device comprising: an implantable heart sound sensor operable to produce an electrical signal representative of at least one heart sound, the heart sound associated with mechanical activity of a patient's heart; a heart sound sensor interface circuit coupled to the heart sound sensor to produce a heart sound signal; an implantable posture sensor operable to produce an electrical signal representative of a patient's posture; a memory circuit; and a controller circuit, coupled to the heart sound sensor interface circuit and the posture circuit, wherein the controller circuit is configured to: determine a patient posture using the posture sensor signal; measure the at least one heart sound in correspondence with at least one corresponding determined patient posture; adjust the heart sound measurement by using the corresponding determined patient posture to reduce or remove variation in the heart sound measurement due to patient posture; and provide the adjusted heart sound measurement to a user or an automated process.