ISCHEMIA DETECTION USING A HEART SOUND SENSOR
First Claim
1. A method comprising:
- sensing a heart sound signal using a medical device, the heart sound associated with mechanical vibration of a heart of a patient;
establishing a baseline value of a characteristic of at least one of an S3 or S4 heart sound in the heart sound signal;
sensing at least one subsequent heart sound signal for the patient using the device;
deeming that an ischemic event occurred using at least a measured subsequent change in the heart sound characteristic from the established baseline value of the characteristic; and
providing an indication of the ischemic event to a user or process.
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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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Citations
21 Claims
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1. A method comprising:
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sensing a heart sound signal using a medical device, the heart sound associated with mechanical vibration of a heart of a patient; establishing a baseline value of a characteristic of at least one of an S3 or S4 heart sound in the heart sound signal; sensing at least one subsequent heart sound signal for the patient using the device; deeming that an ischemic event occurred using at least a measured subsequent change in the heart sound characteristic from the established baseline value of the characteristic; and providing an indication of the ischemic event to a user or process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification