EVALUATION OF IMPLANTABLE MEDICAL DEVICE SENSING INTEGRITY BASED ON EVOKED SIGNALS
First Claim
1. A method comprising:
- obtaining one or more sensed signals evoked by tissue in response to electrical stimulation of the tissue by an implantable medical device; and
evaluating sensing integrity of the implantable medical device based on analysis of the sensed signals.
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Abstract
The disclosure describes techniques for evaluating sensing integrity of an implantable medical device (IMD) based on sensing of evoked signals. Sensing integrity may provide an indication of reliability of implantable leads associated with an IMD. The sensed signals may be signals that are evoked by tissue in response to delivery of electrical stimulation. The techniques may involve evaluation of sensing integrity based on sensing of evoked cardiac potentials generated in response to cardiac stimulation, such as pacing pulses. Signals evoked in response to electrical stimulation may be measured and trended to permit analysis of evoked signals over time. Lead integrity may be inferred from sensing integrity. By analyzing evoked signals, sensing integrity may be evaluated without sensing intrinsic events. Evaluation of sensing integrity can facilitate analysis in the presence of pacing, including pacing delivered by IMDs that pace substantially continuously, such as IMDs configured to support cardiac resynchronization therapy (CRT).
136 Citations
42 Claims
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1. A method comprising:
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obtaining one or more sensed signals evoked by tissue in response to electrical stimulation of the tissue by an implantable medical device; and evaluating sensing integrity of the implantable medical device based on analysis of the sensed signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An implantable medical device system comprising:
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an implantable stimulation generator configured to deliver electrical stimulation to tissue; an implantable sensing module configured to sense one or more signals evoked by the tissue in response to the electrical stimulation of the tissue by the implantable stimulation generator; implantable memory configured to store data relating to the sensed signals; and an evaluation unit configured to support evaluation of sensing integrity of the implantable sensing module based on analysis of the stored data. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. An implantable medical device system comprising:
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means for obtaining one or more sensed signals evoked by tissue in response to electrical stimulation of the tissue by an implantable medical device; and means for evaluating sensing integrity of the implantable medical device based on analysis of the sensed signals. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41)
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42. A computer-readable storage medium comprising instruction for causing a programmable processor to:
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obtain one or more sensed signals evoked by tissue in response to electrical stimulation of the tissue by an implantable medical device; and evaluate sensing integrity of the implantable medical device based on analysis of the sensed signals.
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Specification