NON-SUSTAINED TACHYARRHYTHMIA ANALYSIS TO IDENTIFY LEAD RELATED CONDITION
First Claim
1. A method comprising:
- detecting a plurality of cardiac events based on a cardiac electrical signal;
measuring a plurality of intervals between consecutive ones of the detected cardiac events;
detecting a non-sustained tachyarrhythmia based on a subset of the measured intervals meeting a non-sustained tachyarrhythmia criterion;
after detecting the non-sustained tachyarrhythmia, calculating at least one metric based on the subset of the measured intervals; and
identifying a lead related condition based on the at least one metric.
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Abstract
Techniques for determining whether a lead related condition exists based on analysis of a cardiac electrical signal associated with a non-sustained tachyarrhythmia (NST) are described. In some examples, the techniques include determining the duration of intervals between consecutive cardiac events, e.g., R-R intervals, during an NST. The techniques may further include determining one or more metrics based on the durations of the intervals during the NST. Examples of metrics include an average, a minimum, a maximum, a range, a median, a mode, or a mean. A lead related condition is identified based on the values of the one or more metrics, e.g., by comparison to respective thresholds. In some examples, an alert is provided or a therapy modification is suggested if a lead related condition is identified.
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Citations
23 Claims
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1. A method comprising:
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detecting a plurality of cardiac events based on a cardiac electrical signal; measuring a plurality of intervals between consecutive ones of the detected cardiac events; detecting a non-sustained tachyarrhythmia based on a subset of the measured intervals meeting a non-sustained tachyarrhythmia criterion; after detecting the non-sustained tachyarrhythmia, calculating at least one metric based on the subset of the measured intervals; and identifying a lead related condition based on the at least one metric. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system comprising:
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an electrical sensing module that receives a cardiac electrical signal from a plurality of electrodes, and detects a plurality of cardiac events based on the cardiac electrical signal; an interval measurement module that measures a plurality of intervals between consecutive ones of the detected cardiac events; a non-sustained tachyarrhythmia detection module that detects a non-sustained tachyarrhythmia based on a subset of the measured intervals meeting a non-sustained tachyarrhythmia criterion; a calculation module that calculates at least one metric based on the subset of the measured intervals after the detection of the non-sustained tachyarrhythmia; and a lead integrity evaluation module that identifies a lead related condition based on the metric. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A system comprising:
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means for detecting a plurality of cardiac events based on a cardiac electrical signal; means for measuring a plurality of intervals between consecutive ones of the detected cardiac events; means for detecting a non-sustained tachyarrhythmia based on a subset of the measured intervals meeting a non-sustained tachyarrhythmia criterion; means for calculating at least one metric based on the subset of the measured intervals after detecting the non-sustained tachyarrhythmia; and means for identifying a lead related condition based on the at least one metric. - View Dependent Claims (20, 21)
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22. A computer readable storage medium comprising instructions that cause a processor to:
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detect a plurality of cardiac events based on a cardiac electrical signal; measure a plurality of intervals between consecutive ones of the detected cardiac events; detect a non-sustained tachyarrhythmia based on a subset of the measured intervals meeting a non-sustained tachyarrhythmia criterion; after detecting the non-sustained tachyarrhythmia, calculate at least one metric based on the subset of the measured intervals; and identify a lead related condition based on the at least one metric. - View Dependent Claims (23)
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Specification