T-wave oversensing
First Claim
1. A method for determining whether T-wave over-sensing (TWOS) occurred during a cardiac episode comprising a plurality of sensed beats, the method comprising:
- identifying at least one beat run of at least a predetermined number of consecutive ones of the beats during the cardiac episode, wherein each of the beats within the run have at least one characteristic that alternates from beat to beat;
clustering the beats into two or more clusters based on beat-to-beat interval length; and
determining, based on at least one of the runs and the clusters, whether TWOS occurred during the cardiac episode.
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Abstract
The present disclosure is directed to the classification of cardiac episodes using an algorithm. In various examples, an episode classification algorithm evaluates electrogram signal data to determine whether T-wave oversensing has occurred. The T-wave oversensing analysis may include, for example, identifying beat runs within the cardiac episode whether the beats within the run have at least one characteristic that alternates beat to be or clustering beats within the cardiac episode based on beat to beat interval length. The T-wave oversensing determination may be based on probabilistic analysis in some examples.
207 Citations
32 Claims
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1. A method for determining whether T-wave over-sensing (TWOS) occurred during a cardiac episode comprising a plurality of sensed beats, the method comprising:
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identifying at least one beat run of at least a predetermined number of consecutive ones of the beats during the cardiac episode, wherein each of the beats within the run have at least one characteristic that alternates from beat to beat; clustering the beats into two or more clusters based on beat-to-beat interval length; and determining, based on at least one of the runs and the clusters, whether TWOS occurred during the cardiac episode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for determining whether T-wave over-sensing (TWOS) occurred during a cardiac episode comprising a plurality of sensed beats, the system comprising:
a processor configured to; identify at least one beat run of at least a predetermined number of consecutive ones of the beats during the cardiac episode, wherein each of the beats within the run have at least one characteristic that alternates from beat to beat; cluster the beats into two or more clusters based on beat-to-beat interval length; and determine, based on at least one of the runs and the clusters, whether TWOS occurred during the cardiac episode. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A non-transitory computer-readable medium comprising instructions for causing a programmable processor to determine whether T-wave over-sensing (TWOS) occurred during a cardiac episode comprising a plurality of sensed beats, the instructions causing the programmable processor to:
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identify at least one beat run of at least a predetermined number of consecutive ones of the beats during the cardiac episode, wherein each of the beats within the run have at least one characteristic that alternates from beat to beat; cluster the beats into two or more clusters based on beat-to-beat interval length; and determine, based on at least one of the runs and the clusters, whether TWOS occurred during the cardiac episode.
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31. A system for determining whether T-wave over-sensing (TWOS) occurred during a cardiac episode comprising a plurality of sensed beats, the system comprising:
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means for identifying at least one beat run of at least a predetermined number of consecutive ones of the beats during the cardiac episode, wherein each of the beats within the run have at least one characteristic that alternates from beat to beat; means clustering the beats into two or more clusters based on beat-to-beat interval length; and means determining, based on at least one of the runs and the clusters, whether TWOS occurred during the cardiac episode.
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32. A system for determining whether T-wave over-sensing (TWOS) occurred during a cardiac episode comprising a plurality of sensed beats, the system comprising:
a processor configured to; cluster the beats into two or more clusters based on beat-to-beat interval length; and determine, based on the clusters, whether TWOS occurred during the cardiac episode.
Specification