Reducing false positive lead integrity alerts
First Claim
1. An implantable medical device comprising:
- a sensing circuit configured to receive a cardiac electrical signal and sense cardiac events within the cardiac electrical signal, the cardiac electrical signal received via electrodes carried by a medical electrical lead when the medical electrical lead is coupled to the implantable medical device; and
a control module coupled to the sensing circuit and configured to;
determine a plurality of sensed event intervals, each of the plurality of sensed event intervals being a time interval between two consecutive ones of the sensed cardiac events;
detect a non-sustained tachyarrhythmia (NST) episode based on at least a portion of the sensed event intervals;
determine if the sensed event intervals satisfy an oversensing criteria;
when the sensed event intervals satisfy the oversensing criteria, compare the detected NST episode to non-lead related oversensing criteria;
ignore the NST episode for purposes of determining whether to generate a lead integrity alert when the non-lead related oversensing criteria are satisfied;
use the NST episode as part of an NST component of a lead issue detection criteria when the non-lead related oversensing criteria are not satisfied;
determine that the NST component of the lead issue detection criteria is met; and
generate the lead integrity alert when the NST component of the lead issue detection criteria is met.
1 Assignment
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Accused Products
Abstract
An implantable medical device having a sensing module and a control module is configured to receive a cardiac electrical signal and sense events from the cardiac electrical signal received via electrodes carried by a medical electrical lead when the medical electrical lead is coupled to the implantable medical device. The control module coupled is configured to detect non-sustained tachyarrhythmia (NST) episodes based on sensed event intervals and determine if the sensed event intervals during the detected NST episode satisfy oversensing criteria. If the oversensing criteria are satisfied, the control module determines whether the detected NST episode satisfies non-lead related oversensing criteria and withholds a lead integrity alert when the NST episode meeting the oversensing criteria is determined to satisfy non-lead related oversensing criteria.
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Citations
27 Claims
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1. An implantable medical device comprising:
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a sensing circuit configured to receive a cardiac electrical signal and sense cardiac events within the cardiac electrical signal, the cardiac electrical signal received via electrodes carried by a medical electrical lead when the medical electrical lead is coupled to the implantable medical device; and a control module coupled to the sensing circuit and configured to; determine a plurality of sensed event intervals, each of the plurality of sensed event intervals being a time interval between two consecutive ones of the sensed cardiac events; detect a non-sustained tachyarrhythmia (NST) episode based on at least a portion of the sensed event intervals; determine if the sensed event intervals satisfy an oversensing criteria; when the sensed event intervals satisfy the oversensing criteria, compare the detected NST episode to non-lead related oversensing criteria; ignore the NST episode for purposes of determining whether to generate a lead integrity alert when the non-lead related oversensing criteria are satisfied; use the NST episode as part of an NST component of a lead issue detection criteria when the non-lead related oversensing criteria are not satisfied; determine that the NST component of the lead issue detection criteria is met; and generate the lead integrity alert when the NST component of the lead issue detection criteria is met. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method comprising:
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sensing events from the cardiac electrical signal by a sensing module of an implantable medical device, the cardiac electrical signal received via electrodes carried by a medical electrical lead when the medical electrical lead is coupled to the implantable medical device; determining by a control module of the implantable medical device a plurality of sensed event intervals, each of the plurality of sensed event intervals being a time interval between two consecutive ones of the sensed events; detecting a non-sustained tachyarrhythmia (NST) episode based on at least a portion of the sensed event intervals; determining if the sensed event intervals of the NST episode satisfy oversensing criteria; when the sensed event intervals satisfy the oversensing criteria; comparing the detected NST episode to non-lead related oversensing criteria; ignoring the NST episode for purposes of determining whether to generate a lead integrity alert when the non-lead related oversensing criteria are satisfied; and using the NST episode as part of an NST component of a lead issue detection criteria when the non-lead related oversensing criteria are not satisfied; determining that the NST component of the lead issue detection criteria is met; and generating the lead integrity alert when the NST component of the lead issue detection criteria is met. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification