System and method for ischemia classification with implantable medical device
First Claim
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1. A method comprising:
- obtaining an electrogram representing cardiac data from an implantable medical device for a plurality of cardiac cycles during a period of time;
monitoring heart rate during the period of time;
determining an ST segment data point for each of the cardiac cycles;
evaluating the ST segment data points;
determining whether the evaluated ST segment data points indicate supply ischemia;
determining whether a trend of a plurality of the ST segment data points tracked a trend of a corresponding plurality of monitored heart rates during the period of time; and
confirming the determination of whether the evaluated ST segment data points indicate supply ischemia based on whether the trend of the plurality of ST segment data points tracked the trend of the plurality of monitored heart rates.
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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.
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Citations
21 Claims
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1. A method comprising:
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obtaining an electrogram representing cardiac data from an implantable medical device for a plurality of cardiac cycles during a period of time; monitoring heart rate during the period of time; determining an ST segment data point for each of the cardiac cycles; evaluating the ST segment data points; determining whether the evaluated ST segment data points indicate supply ischemia; determining whether a trend of a plurality of the ST segment data points tracked a trend of a corresponding plurality of monitored heart rates during the period of time; and confirming the determination of whether the evaluated ST segment data points indicate supply ischemia based on whether the trend of the plurality of ST segment data points tracked the trend of the plurality of monitored heart rates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 19)
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15. An apparatus comprising:
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means for obtaining an electrogram representing cardiac data from an implantable medical device for a plurality of cardiac cycles during a period of time; means for monitoring heart rate during the period of time; means for determining an ST segment data point for each of the cardiac cycles; means for evaluating the ST segment data points; means for determining whether the evaluated ST segment data points indicate supply ischemia; means for determining whether a trend of a plurality of the ST segment data points tracked a trend of a corresponding plurality of monitored heart rates during the period of time; and means for confirming the determination of whether the evaluated ST segment data points indicate supply ischemia based on whether the trend of the plurality of ST segment data points tracked the trend of the plurality of monitored heart rates. - View Dependent Claims (16, 17, 18, 20, 21)
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Specification