METHOD AND APPARATUS FOR IDENTIFYING CARDIAC AND NON-CARDIAC OVERSENSING USING INTRACARDIAC ELECTROGRAMS
First Claim
1. A method comprising:
- operating an implanted medical device in accordance with sensing parameters for a plurality of cardiac cycles;
identifying oversensing by the implanted medical device; and
automatically adjusting at least one of the sensing parameters of the implanted medical device in response to identifying the oversensing, wherein the at least one parameter is a number of intervals to detection (NID) if oversensing is due to a lead related condition.
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Abstract
A method and apparatus for automatically identifying various types of cardiac and non-cardiac oversensing and automatically performing a corrective action to reduce the likelihood of oversensing is provided. EGM data, including time intervals between sensed and paced events and signal morphologies, are analyzed for patterns indicative of various types of oversensing, including oversensing of far-field R-waves, R-waves, T-waves, or noise associated with electromagnetic interference, non-cardiac myopotentials, a lead fracture, or a poor lead connection. Identification of oversensing and its suspected cause are reported so that corrective action may be taken. The corrective action may include, for example, adjusting sensing parameters such as blanking periods, decay constants, decay delays, threshold values, sensitivity values, electrode configurations and the like.
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Citations
29 Claims
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1. A method comprising:
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operating an implanted medical device in accordance with sensing parameters for a plurality of cardiac cycles; identifying oversensing by the implanted medical device; and automatically adjusting at least one of the sensing parameters of the implanted medical device in response to identifying the oversensing, wherein the at least one parameter is a number of intervals to detection (NID) if oversensing is due to a lead related condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An implantable medical device comprising:
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at least one sensing electrode to sense cardiac data from a heart of a patient in accordance with programmed sensing parameters for a plurality of cardiac cycles; and a processor to identify oversensing by the implantable medical device based on the sensed cardiac data and automatically adjust at least one of the sensing parameter of the implantable medical device in response to identifying the oversensing, wherein the automatic adjustment is an increase in a number of intervals to detection (NID) if the oversensing is due to a lead related condition. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 26, 27, 28, 29)
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Specification