Non-sustained tachyarrhythmia analysis to identify lead related condition
First Claim
1. A method comprising, with one or more processors:
- 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, wherein the at least one metric comprises at least one of a range of the subset of measured intervals or a minimum of the subset of measured intervals; and
identifying a lead related condition based on the at least one metric by at least comparing the at least one metric to a predetermined threshold and identifying the lead related condition based on the comparison.
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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.
25 Citations
18 Claims
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1. A method comprising, with one or more processors:
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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, wherein the at least one metric comprises at least one of a range of the subset of measured intervals or a minimum of the subset of measured intervals; and identifying a lead related condition based on the at least one metric by at least comparing the at least one metric to a predetermined threshold and identifying the lead related condition based on the comparison. - View Dependent Claims (2, 3, 4, 5, 6)
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7. 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, wherein the at least one metric comprises at least one of a range of the subset of measured intervals or a minimum of the subset of measured intervals; and a lead integrity evaluation module that identifies a lead related condition based on the metric by at least comparing the at least one metric to a predetermined threshold and identifying the lead related condition based on the comparison. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. 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, wherein the at least one metric comprises at least one of a range of the subset of measured intervals or a minimum of the subset of measured intervals; and means for identifying a lead related condition based on the at least one metric, wherein the means for identifying a lead related condition comprises means for comparing the at least one metric to a predetermined threshold and means for identifying the lead related condition based on the comparison. - View Dependent Claims (16)
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17. A computer readable storage medium comprising instructions that cause one or more processors 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, wherein the at least one metric comprises at least one of a range of the subset of measured intervals or a minimum of the subset of measured intervals; and identify a lead related condition based on the at least one metric by at least comparing the at least one metric to a predetermined threshold and identifying the lead related condition based on the comparison. - View Dependent Claims (18)
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Specification