Monitoring of heart sounds
First Claim
1. A system comprising:
- an implantable heart sound sensor circuit configured to produce an electrical heart sound signal representative of a heart sound of a subject;
a physiological sensor configured to produce a physiological signal representative of activity of the subject;
a processor circuit coupled to the heart sound sensor circuit and the second sensor circuit, wherein the processor circuit includes;
a detection circuit configured to detect a change in phase of a circadian cycle of the subject using the physiological signal;
a heart sound feature circuit configured to identify a heart sound feature in the electrical heart sound signal in relation to a specified phase of the circadian cycle; and
a trending circuit configured to trend the identified heart sound feature during the specified phase of the circadian cycle, andwherein the processor circuit is configured to generate an indication of a change in a physiologic condition of the subject according to the trend and provide the indication to a user or process.
0 Assignments
0 Petitions
Accused Products
Abstract
This document discusses, among other things, a system comprising an implantable medical device (IMD) including an implantable heart sound sensor circuit configured to produce an electrical heart sound signal representative of a heart sound of a subject and a processor circuit. The processor circuit is coupled to the heart sound sensor circuit and includes a detection circuit, a heart sound feature circuit and a trending circuit. The detection circuit configured to detect a physiologic perturbation and the heart sound feature circuit is configured to identify a heart sound feature in the electrical signal. The processor circuit is configured to trigger the heart sound feature circuit in relation to a detected physiologic perturbation. The trending circuit is configured to trend the heart sound feature in relation to a recurrence of the physiologic perturbation. The processor circuit is configured to declare a change in a physiologic condition of the patient according to the trending.
-
Citations
20 Claims
-
1. A system comprising:
-
an implantable heart sound sensor circuit configured to produce an electrical heart sound signal representative of a heart sound of a subject; a physiological sensor configured to produce a physiological signal representative of activity of the subject; a processor circuit coupled to the heart sound sensor circuit and the second sensor circuit, wherein the processor circuit includes; a detection circuit configured to detect a change in phase of a circadian cycle of the subject using the physiological signal; a heart sound feature circuit configured to identify a heart sound feature in the electrical heart sound signal in relation to a specified phase of the circadian cycle; and a trending circuit configured to trend the identified heart sound feature during the specified phase of the circadian cycle, and wherein the processor circuit is configured to generate an indication of a change in a physiologic condition of the subject according to the trend and provide the indication to a user or process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method of operating a medical device, the method comprising:
-
sensing a physiological signal representative of activity of a subject; detecting a change in phase of a circadian cycle of the subject using the physiological signal; sensing an electrical heart sound signal representative of a heart sound of the subject; identifying a heart sound feature in the electrical heart sound signal in relation to a specified phase of the circadian cycle; trending the identified heart sound feature during the specified phase of the circadian cycle; and generating an indication of a change in a physiologic condition of the subject according to the trend and providing the indication to a user or process. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification