SYSTEM AND METHOD FOR ISCHEMIA CLASSIFICATION WITH IMPLANTABLE MEDICAL DEVICE
First Claim
Patent Images
1. A method comprising:
- obtaining an electrogram representing cardiac data from an implantable medical device for a plurality of cardiac cycles;
determining an ST segment data point for each of the cardiac cycles;
initiating a timer interval when one of the ST segment data points exceeds a threshold value;
calculating a slope between two of the ST segment data points that occur during the timer interval; and
determining whether the ST segment data points indicate ischemia based on the calculated slope.
0 Assignments
0 Petitions
Accused Products
Abstract
An implantable medical device monitors ST segment data collected from EGM. ST trends are established and monitored over time. The IMD is able to discern whether the data indicate supply ischemia, demand ischemia, or other physiological causes. The IMD is then able to provide appropriate information and alerts.
23 Citations
25 Claims
-
1. A method comprising:
-
obtaining an electrogram representing cardiac data from an implantable medical device for a plurality of cardiac cycles; determining an ST segment data point for each of the cardiac cycles; initiating a timer interval when one of the ST segment data points exceeds a threshold value; calculating a slope between two of the ST segment data points that occur during the timer interval; and determining whether the ST segment data points indicate ischemia based on the calculated slope. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. An apparatus comprising:
-
means for obtaining an electrogram representing cardiac data from an implantable medical device for a plurality of cardiac cycles; means for determining an ST segment data point for each of the cardiac cycles; means for initiating a timer interval when one of the ST segment data points exceeds a threshold value; means for calculating a slope between two of the ST segment data points that occur during the timer interval; and means for determining whether the ST segment data points indicate ischemia based on the calculated slope. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
-
25. An apparatus comprising:
-
a sensor input that obtains an electrogram representing cardiac data for a plurality of cardiac cycles; an electrogram analysis module that determines an ST segment data point for each of the cardiac cycles; and an ST analysis module that; initiates a timer interval when one of the ST segment data points exceeds a threshold value; calculates a slope between two of the ST segment data points that occur during the timer interval; and that determines whether the ST segment data points indicate ischemia based on the calculated slope.
-
Specification