Ischemia detection using a heart sound sensor
First Claim
1. A method of operating a medical device system, the method comprising:
- sensing a heart sound signal using an implantable medical device of the medical device system, wherein a heart sound is associated with mechanical vibration of a heart of a subject;
establishing a baseline value of a characteristic of at least one heart sound in the heart sound signal;
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 heart sound characteristic;
discriminating a transient ischemic event from an acute myocardial infarction (AMI) using the measured subsequent change in the heart sound characteristic from the established baseline value of the heart sound characteristic; and
generating, by the medical device system, an indication of the ischemic event or AMI and providing the indication to a user or process.
0 Assignments
0 Petitions
Accused Products
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.
-
Citations
20 Claims
-
1. A method of operating a medical device system, the method comprising:
-
sensing a heart sound signal using an implantable medical device of the medical device system, wherein a heart sound is associated with mechanical vibration of a heart of a subject; establishing a baseline value of a characteristic of at least one heart sound in the heart sound signal; 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 heart sound characteristic; discriminating a transient ischemic event from an acute myocardial infarction (AMI) using the measured subsequent change in the heart sound characteristic from the established baseline value of the heart sound characteristic; and generating, by the medical device system, an indication of the ischemic event or AMI and providing the indication to a user or process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A system comprising:
an implantable medical device (IMD) comprising; an implantable heart sound sensor configured to sense a heart sound signal representative of at least one heart sound, wherein the heart sound is associated with mechanical activity of a patient'"'"'s heart; a heart sound sensor interface circuit coupled to the heart sound sensor to produce the heart sound signal; and a signal analyzer circuit coupled to the heart sound sensor interface circuit, wherein the signal analyzer circuit is configured to; establish a baseline value of a characteristic of at least one heart sound in the heart sound signal; deem that an ischemic event occurred using at least a measured subsequent change in the heart sound characteristic from the established baseline value of the heart sound characteristic; discriminate a transient ischemic event from an AMI using the measured subsequent change in the heart sound characteristic from the established baseline value of the heart sound characteristic; and provide an indication of the ischemic event or AMI to a user or process. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification