Non-captured intrinsic discrimination in cardiac pacing response classification
First Claim
1. A method of operating a cardiac device to classify a cardiac response to a pacing pulse, comprising:
- delivering the pacing pulse to a heart;
sensing a cardiac signal following delivery of the pacing pulse;
determining if a peak of the cardiac signal falls within one of a plurality of detection windows associated with a non-captured, intrinsic response, each of the intrinsic detection windows finitely bounded in time and amplitude; and
classifying the cardiac response to the pacing pulse as the non-captured intrinsic response if the cardiac signal peak falls within one of the intrinsic detection windows; and
delivering pacing therapy based on the cardiac response classification.
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Abstract
Cardiac devices and methods discriminate non-captured intrinsic beats during evoked response detection and classification by comparing the features of a post-pace cardiac signal with expected features associated with a non-captured response with intrinsic activation. Detection of a non-captured response with intrinsic activation may be based on the peak amplitude and timing of the cardiac signal. The methods may be used to discriminate between a fusion or capture beat and a non-captured intrinsic beat. Discriminating between possible cardiac responses to the pacing pulse may be useful, for example, during automatic capture verification and/or a capture threshold test.
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Citations
22 Claims
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1. A method of operating a cardiac device to classify a cardiac response to a pacing pulse, comprising:
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delivering the pacing pulse to a heart; sensing a cardiac signal following delivery of the pacing pulse; determining if a peak of the cardiac signal falls within one of a plurality of detection windows associated with a non-captured, intrinsic response, each of the intrinsic detection windows finitely bounded in time and amplitude; and classifying the cardiac response to the pacing pulse as the non-captured intrinsic response if the cardiac signal peak falls within one of the intrinsic detection windows; and delivering pacing therapy based on the cardiac response classification. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for classifying a cardiac response to a pacing pulse, comprising:
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a sensor system comprising a plurality of electrodes electrically coupled to a heart, the sensor system configured to sense a cardiac signal following delivery of the pacing pulse; and a processor coupled to the sensing system, the processor configured to determine if a peak of the cardiac signal falls within one of a plurality of detection windows associated with a non-captured intrinsic response, each of the intrinsic detection windows finitely bounded in time and amplitude, the processor further configured to classify the cardiac response to the pacing pulse as the non-captured intrinsic response if the cardiac signal peak falls within one of the intrinsic detection windows; and therapy circuit configured to deliver pacing therapy based on the cardiac response classification. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A cardiac device, comprising:
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a pulse generator configured to deliver a pacing pulse to a heart; a sensing system configured to sense a cardiac signal following delivery of a pacing pulse; means for determining if a peak of the cardiac signal falls within one of a plurality of detection windows associated with a non-captured, intrinsic response, each of the intrinsic detection windows finitely bounded in time and amplitude; means for classifying the cardiac response to the pacing pulse as the non-captured intrinsic response if the cardiac signal peak falls within one of the intrinsic detection windows; and a pulse generator configured to deliver pacing pulses based on the cardiac response classification. - View Dependent Claims (22)
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Specification