Ischemia detection using a heart sound sensor

Details Ischemia detection using a heart sound sensor Ischemia detection using a heart sound sensor

2011-04-12

2011-04-12

Bertram, Eric D (Department: 3766)

Surgery

Diagnostic testing

Cardiovascular

Reexamination Certificate

active

07922669

ABSTRACT:
A system comprising an implantable medical device (IMD) includes an implantable heart sound sensor to produce an electrical signal representative of at least one heart sound. The heart sound is associated with mechanical activity of a patient's heart. Additionally, the IMD includes a heart sound sensor interface circuit coupled to the heart sound sensor to produce a heart sound signal, and a signal analyzer circuit coupled to the heart sound sensor interface circuit. The signal analyzer circuit measures a baseline heart sound signal, and deems that an ischemic event has occurred using, among other things, a measured subsequent change in the heart sound signal from the established baseline heart sound signal.

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