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,wherein the suspected tachyarrhythmia comprises a plurality of sensed events, andwherein measuring an impedance of the lead a plurality of times during the suspected tachyarrhythmia comprises measuring the impedance at least two times between a consecutive two of the plurality of sensed events.
1 Assignment
0 Petitions
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.
136 Citations
25 Claims
-
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, wherein the suspected tachyarrhythmia comprises a plurality of sensed events, and wherein measuring an impedance of the lead a plurality of times during the suspected tachyarrhythmia comprises measuring the impedance at least two times between a consecutive two of the plurality of sensed events. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A system comprising:
-
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, wherein the suspected tachyarrhythmia comprises a plurality of sensed events, and wherein the IMD measures the impedance at least two times between a consecutive two of the plurality of sensed events. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. A computer-readable medium comprising instructions that cause a processor to:
-
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, wherein the suspected tachyarrhythmia comprises a plurality of sensed events, and wherein the instructions that cause the processor to control measurement of an impedance of the lead a plurality of times during the suspected tachyarrhythmia comprise instructions that cause a processor to control measurement of the impedance at least two times between a consecutive two of the plurality of sensed events. - View Dependent Claims (23)
-
-
24. A system comprising:
-
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, wherein the suspected tachyarrhythmia comprises a plurality of sensed events, and wherein the means for measuring an impedance of the lead a plurality of times during the suspected tachyarrhythmia comprises means for measuring the impedance at least two times between a consecutive two of the plurality of sensed events. - View Dependent Claims (25)
-
Specification