Capture verification with intrinsic response discrimination
First Claim
1. A method of automatically classifying a cardiac response to a pacing pulse and delivering therapy, comprising:
- sensing a cardiac signal associated with the pacing pulse;
detecting morphological characteristics of the cardiac signal and measuring a feature value of each of the morphological characteristics;
comparing at least one feature value to at least another feature value;
selecting, based on comparison of the feature values, one or more of the feature values to use for intrinsic response detection;
classifying the cardiac response to the pacing pulse including discriminating between capture and non-capture with intrinsic activity based on comparison of the selected one or more feature values to at least one reference value indicative of an intrinsic response; and
controlling pacing therapy based on the cardiac response to the pacing pulse.
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Abstract
Approaches to automatically classifying a cardiac response to pacing involve discriminating between a captured response and non-capture with intrinsic activation. A capture detection system senses for morphological characteristics of a cardiac signal associated with the pacing pulse. The cardiac signal may be sensed using a defibrillation electrode during one or more time intervals following delivery of the pacing pulse. If a first characteristic of the cardiac signal achieves a threshold value, the system continues to sense the cardiac signal and detects a second characteristic. The cardiac pacing response is determined based on at least one of the first and the second cardiac signal characteristics.
112 Citations
34 Claims
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1. A method of automatically classifying a cardiac response to a pacing pulse and delivering therapy, comprising:
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sensing a cardiac signal associated with the pacing pulse; detecting morphological characteristics of the cardiac signal and measuring a feature value of each of the morphological characteristics; comparing at least one feature value to at least another feature value; selecting, based on comparison of the feature values, one or more of the feature values to use for intrinsic response detection; classifying the cardiac response to the pacing pulse including discriminating between capture and non-capture with intrinsic activity based on comparison of the selected one or more feature values to at least one reference value indicative of an intrinsic response; and controlling pacing therapy based on the cardiac response to the pacing pulse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A capture detection system configured to classify a cardiac pacing response, comprising:
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a plurality of cardiac electrodes configured to electrically couple to a heart; a sensing system, coupled to the cardiac electrodes and configured to sense a cardiac signal associated with a pacing pulse using the plurality of cardiac electrodes; a capture detector coupled to the sensing system, the capture detector configured to; detect morphological characteristics of the cardiac signal; measure a feature value of each of the morphological characteristics; compare at least one feature value to at least another feature value; select, based on comparison of the feature values, one or more of the feature values for use in discriminating between capture and non-capture with intrinsic activity of the cardiac signal; compare the one or more selected feature values to at least one reference value indicative of intrinsic activity; and classify the cardiac pacing response to the pacing pulse based on the comparison of the one or more selected feature values to the at least one reference value indicative of intrinsic activity; and pacing circuitry configured to deliver pacing therapy based on the classification of the cardiac pacing response. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A system for automatically classifying a cardiac response to a pacing pulse, comprising:
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means for sensing a cardiac signal associated with the pacing pulse; means for detecting morphological characteristics of the cardiac signal and measuring a feature value of each of the morphological characteristics; means for comparing at least one feature value to at least one other feature value; means for selecting, based on comparison of the feature values, one or more of the feature values to use for intrinsic response detection; means for classifying the cardiac response to the pacing pulse by discriminating between capture and non-capture with intrinsic activity based on comparison of the selected one or more feature values to at least one reference value indicative of an intrinsic response; and means for delivering cardiac pacing therapy based on cardiac pacing response classification. - View Dependent Claims (30, 31, 32, 33, 34)
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Specification