Method for correction of posture dependence on heart sounds
First Claim
1. An apparatus comprising:
- an implantable heart sound sensor configured to produce an electrical signal representative of at least one heart sound, the heart sound associated with mechanical activity of a patient'"'"'s heart;
an implantable posture sensor operable to produce an electrical signal representative of a patient'"'"'s posture; and
a controller circuit, communicatively 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;
detect a change in the adjusted heart sound measurement; and
provide an indication of congestive heart failure (CHF) to a user or an automated process in response to the detected change.
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Abstract
A system to monitor heart sounds. The system comprises an implantable heart sound sensor configured to produce an electrical signal representative of at least one heart sound, an implantable posture sensor operable to produce an electrical signal representative of a patient'"'"'s posture, and a controller circuit. The controller circuit is configured to determine a patient posture, measure at least one heart sound in correspondence with at least one corresponding 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, detect a change in the adjusted heart sound measurement, and provide an indication of congestive heart failure to a user or an automated process in response to the detected change.
226 Citations
20 Claims
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1. An apparatus comprising:
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an implantable heart sound sensor configured to produce an electrical signal representative of at least one heart sound, the heart sound associated with mechanical activity of a patient'"'"'s heart; an implantable posture sensor operable to produce an electrical signal representative of a patient'"'"'s posture; and a controller circuit, communicatively 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; detect a change in the adjusted heart sound measurement; and provide an indication of congestive heart failure (CHF) to a user or an automated process in response to the detected change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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determining posture of a patient using an implantable medical device; measuring a heart sound in correspondence with at least one corresponding determined patient posture; adjusting the heart sound measurement by using the corresponding determined patient posture for reducing or removing variation in the heart sound measurement due to patient posture; detecting a change in the adjusted heart sound measurement; and providing, in response to the detected change, an indication of CHF to a user or an automated process. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification