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US 8,620,416 B2Granted
System and method for ischemia classification with implantable medical device
AssigneeMedtronic, Inc.
InventorsZhendong Song, Steven N. Lu, Shailesh K. V. Musley, Eduardo N. Warman
Life of this patent
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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.
Claims24
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.
3 more elements
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.
3 more elements
Dependencies are inferred from the claim text.