Systems and methods related to ST segment monitoring by an implantable medical device
First Claim
1. A method of monitoring ST segments, said method comprising:
- sensing electrical cardiac activity over a plurality of heart beats defining a beat set;
for each beat in the beat set, determining whether the beat of the ST segment is a non-classified beat or a classified beat;
for each classified beat, determining whether the beat is a non-detect beat, a minor beat or a major beat;
maintaining a count of classified beats, a count of non-classified beats, a count of major beats, a count of minor beats, and a count of non-detect beats;
declaring the beat set to be one of a non-classified set, a major set, a minor set or a non-detect set based on the relative counts of classified beats, non-classified beats, major beats, minor beats, and non-detect beats.
1 Assignment
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Accused Products
Abstract
Cardiac activity is sensed over a plurality of heart beats defining a beat set. For each beat in the set, it is determined whether the beat is a non-classified beat (e.g., paced beat, a beat outside of a specified heart rate range or a PVC), or a classified beat. For each classified beat, it is determined whether the beat is a non-detect beat, a minor beat or a major beat. Counts of classified beats, non-classified beats, major beats, minor beats, and non-detect beats are maintained. The beat set is declared to be one of a non-classified set, a major set, a minor set or a non-detect set based on the relative counts of classified beats, non-classified beats, major beats, minor beats, and non-detect beats. Over a period of time, counts of beat-set types are maintained and entry into and exit from ST episodes are determined based on these beat-set counts.
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Citations
21 Claims
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1. A method of monitoring ST segments, said method comprising:
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sensing electrical cardiac activity over a plurality of heart beats defining a beat set; for each beat in the beat set, determining whether the beat of the ST segment is a non-classified beat or a classified beat; for each classified beat, determining whether the beat is a non-detect beat, a minor beat or a major beat; maintaining a count of classified beats, a count of non-classified beats, a count of major beats, a count of minor beats, and a count of non-detect beats; declaring the beat set to be one of a non-classified set, a major set, a minor set or a non-detect set based on the relative counts of classified beats, non-classified beats, major beats, minor beats, and non-detect beats. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A device for monitoring ST segments, said device comprising:
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a sensor configured to sense electrical cardiac activity over a plurality of heart beats defining a beat set; and a processor configured to; for each beat in the beat set, determine whether the beat is a non-classified beat or a classified beat; for each classified beat, determine whether the beat of the ST segment is a non-detect beat, a minor beat or a major beat; maintain a count of classified beats, a count of non-classified beats, a count of major beats, a count of minor beats, and a count of non-detect beats; declare the beat set to be one of a non-classified set, a major set, a minor set or a non-detect set based on the relative counts of classified beats, non-classified beats, major beats, minor beats, and non-detect beats.
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Specification