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 second implantable sensor circuit configured to produce a second electrical sensor signal related to one or more physiologic cardiovascular events in the subject;
a processor circuit coupled to the heart sound sensor circuit and the second sensor circuit, wherein the processor circuit includes;
a heart sound feature circuit configured to identify a heart sound feature in the electrical heart sound signal in an absence of a physiologic perturbation;
a detection circuit configured to detect the physiologic perturbation using the second electrical sensor signal, wherein the heart sound feature circuit is configured to identify the heart sound feature in the electrical heart sound signal in relation to the presence of the detected physiologic perturbation; and
a trending circuit configured to trend a change in a difference between the heart sound feature in the presence of the physiologic perturbation and in the absence of the physiologic perturbation, andwherein the processor circuit is configured to declare a change in a physiologic condition of the patient according to the trend and provide an indication of the change to a user or process.
1 Assignment
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.
62 Citations
30 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 second implantable sensor circuit configured to produce a second electrical sensor signal related to one or more physiologic cardiovascular events in the subject; a processor circuit coupled to the heart sound sensor circuit and the second sensor circuit, wherein the processor circuit includes; a heart sound feature circuit configured to identify a heart sound feature in the electrical heart sound signal in an absence of a physiologic perturbation; a detection circuit configured to detect the physiologic perturbation using the second electrical sensor signal, wherein the heart sound feature circuit is configured to identify the heart sound feature in the electrical heart sound signal in relation to the presence of the detected physiologic perturbation; and a trending circuit configured to trend a change in a difference between the heart sound feature in the presence of the physiologic perturbation and in the absence of the physiologic perturbation, and wherein the processor circuit is configured to declare a change in a physiologic condition of the patient according to the trend and provide an indication of the change to a user or process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A method comprising:
-
implantably sensing an electrical heart sound signal representative of a heart sound of a subject; identifying a feature in the heart sound signal in an absence of a physiologic perturbation; implantably sensing a second electrical signal related to one or more physiologic cardiovascular events in the subject; detecting the physiologic perturbation using the second signal; identifying the feature of the heart sound signal in the presence of the detected physiologic perturbation; trending a change in a difference between the heart sound feature in the presence of the physiologic perturbation and the heart sound feature in the absence of the physiologic perturbation; identifying a change in a physiologic condition of the subject from the trending; and providing an indication of the change to a user or process. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
-
-
27. A system comprising:
-
means for implantably sensing an electrical heart sound signal representative of a heart sound of a subject; means for identifying a feature in the heart sound signal in an absence of a physiologic perturbation; means for implantably sensing a second signal related to one or more physiologic cardiovascular events in the subject; means for detecting the physiologic perturbation using the second signal; means for identifying the heart sound feature in the presence of the detected physiologic perturbation; means for trending a change in a difference between the heart sound feature in the presence of the physiologic perturbation and the heart sound feature in the absence of the physiologic perturbation; means for identifying a change in a physiologic condition of the subject from the trending; and means for providing an indication of the change to a user or process.
-
-
28. 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; a second implantable sensor circuit configured to produce a second electrical sensor signal related to one or more physiologic cardiovascular events in the subject; a first processor circuit coupled to the heart sound sensor circuit and the second sensor circuit, wherein the processor circuit includes; a heart sound feature circuit configured to identify a heart sound feature in the electrical heart sound signal in an absence of a physiologic perturbation; a detection circuit configured to detect the physiologic perturbation using the second sensor signal, wherein the heart sound feature circuit is configured to identify the heart sound feature in the electrical heart sound signal in the presence of the detected physiologic perturbation; and an external device including; a second processor circuit including a trending circuit configured to trend a change in a difference between the heart sound feature in the presence of the physiologic perturbation and in the absence of the physiologic perturbation, wherein the second processor circuit is configured to declare a change in a physiologic condition of the subject according to the trending and provide an indication of the change to a user or process. - View Dependent Claims (29, 30)
-
Specification