Capture detection for multi-chamber pacing
First Claim
1. A method, comprising:
- delivering a pacing pulse to a left heart chamber during a cardiac cycle;
delivering a pacing pulse to a right heart chamber during the cardiac cycle;
sensing a cardiac electrogram signal following the pacing pulses; and
distinguishing between at least two of left chamber capture only, right chamber capture only, and bi-chamber capture based on characteristics of the cardiac electrogram signal.
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Abstract
Multi-chamber pacing may result in capture of one chamber, capture of multiple chambers, fusion, or non-capture. Approaches for detecting various capture conditions during multi-chamber pacing are described. Pacing pulses are delivered to left and right heart chambers during a cardiac cycle. A cardiac electrogram signal is sensed following the delivery of the pacing pulses. Left chamber capture only, right chamber capture only, and bi-chamber capture may be distinguished based on characteristics of the cardiac electrogram signal. Multi-chamber capture detection may be implemented using detection windows having dimensions of time and amplitude. The detection windows are associated with expected features, such as expected signal peaks, under a particular capture condition. The cardiac electrogram signal features are compared to detection windows to determine the capture condition.
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Citations
34 Claims
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1. A method, comprising:
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delivering a pacing pulse to a left heart chamber during a cardiac cycle;
delivering a pacing pulse to a right heart chamber during the cardiac cycle;
sensing a cardiac electrogram signal following the pacing pulses; and
distinguishing between at least two of left chamber capture only, right chamber capture only, and bi-chamber capture based on characteristics of the cardiac electrogram signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A cardiac device, comprising:
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sensing circuitry comprising cardiac electrodes and configured to sense an cardiac electrogram signal following delivery of pacing pulses delivered to left and right heart chambers, respectively, during a cardiac cycle; and
a processor coupled to the sensing circuitry, the processor configured to distinguish between at least two of left chamber capture only, right chamber capture only, and bi-chamber capture based on characteristics of the cardiac electrogram signal. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A cardiac response detection system, comprising:
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a pulse generator configured to deliver pacing pulses to left and right heart chambers, respectively, during a cardiac cycle;
means for sensing a cardiac electrogram signal following the pacing pulses; and
means for distinguishing between at least two of multi-chamber capture, left chamber capture only, and right chamber capture only based on characteristics of the cardiac electrogram signal. - View Dependent Claims (33, 34)
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Specification