LEAD INTEGRITY TESTING DURING SUSPECTED TACHYARRHYTHMIAS
First Claim
1. A method comprising:
- detecting a suspected tachyarrhythmia via at least one implantable medical lead;
in response to detecting the suspected tachyarrhythmia, measuring an impedance of the lead a plurality of times during the suspected tachyarrhythmia to obtain a plurality of impedance measurements;
comparing the impedance measurements; and
evaluating integrity of the lead based upon the comparison.
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Accused Products
Abstract
Techniques for performing a lead integrity test during a suspected tachyarrhythmia are described. An implantable medical device (IMD) may perform the test prior to delivering a therapeutic shock to treat the suspected tachyarrhythmia and, in some cases, may withhold the shock based on the test. In some examples, the IMD measures an impedance of a lead a plurality of times during the suspected tachyarrhythmia. In some examples, the IMD measures the impedance a plurality of times between two sensed events of the suspected tachyarrhythmia. The IMD or another device may determine a variability of, or otherwise compare, the measured impedances to evaluate the integrity of the lead. Instead of or in addition to withholding a shock, the IMD or another device may change a sensing or stimulation vector of the IMD, or provide an alert to a user, if the integrity test indicates a possible lead integrity issue.
111 Citations
29 Claims
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1. A method comprising:
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detecting a suspected tachyarrhythmia via at least one implantable medical lead; in response to detecting the suspected tachyarrhythmia, measuring an impedance of the lead a plurality of times during the suspected tachyarrhythmia to obtain a plurality of impedance measurements; comparing the impedance measurements; and evaluating integrity of the lead based upon the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system comprising:
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an implantable medical lead; an implantable medical device (IMD) coupled to the lead, wherein the IMD detects a suspected tachyarrhythmia via the lead and, in response to detecting the suspected tachyarrhythmia, measures an impedance of the lead a plurality of times during the suspected tachyarrhythmia; and a processor that compares the measured impedances, and evaluates integrity of the lead based upon the comparison. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A computer-readable medium comprising instructions that cause a processor to:
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detect a suspected tachyarrhythmia via at least one implantable medical lead; in response to detecting the suspected tachyarrhythmia, control measurement of an impedance of the lead a plurality of times during the suspected tachyarrhythmia to obtain a plurality of impedance measurements; compare the impedance measurements; and evaluate integrity of the lead based upon the comparison. - View Dependent Claims (25, 26)
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27. A system comprising:
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means for detecting a suspected tachyarrhythmia via at least one implantable medical lead; means for measuring an impedance of the lead a plurality of times during the suspected tachyarrhythmia to obtain a plurality of impedance measurements in response to detecting the suspected tachyarrhythmia; means for comparing the impedance measurements; and means for evaluating integrity of the lead based upon the comparison. - View Dependent Claims (28, 29)
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Specification