Atrial capture verification
First Claim
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1. A method of classifying a cardiac response to pacing, comprising:
- delivering a first pacing pulse to an atrium during a first cardiac cycle;
sensing for an atrial evoked response following delivery of and associated with the first atrial pacing pulsesensing for an intrinsic activation of a ventricle during the first cardiac cycle;
delivering a pacing pulse to the ventricle if the intrinsic ventricular activation is not sensed during the first cardiac cycle;
sensing in the atrium for a retrograde P-wave, the retrograde P-wave responsive to the ventricular pacing pulse or the intrinsic ventricular activation;
classifying the cardiac response to the first atrial pacing pulse as a non-captured response if the retrograde P-wave is detected and the atrial evoked response is not detected; and
classifying the cardiac response to the first atrial pacing pulse as a captured response if the atrial evoked response is detected and the retrograde P-wave is not detected.
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Abstract
Methods and systems for classifying cardiac responses to pacing stimulation and/or preventing retrograde cardiac conduction are described. Following delivery of a pacing pulse to an atrium of the patient'"'"'heart during a cardiac cycle, the system senses in the atrium for a retrograde P-wave. The system classifies the atrial response to the pacing pulse based on detection of the retrograde P-wave. The system may also sense for an atrial evoked response and utilize the atrial evoked response in classifying the cardiac pacing response.
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Citations
19 Claims
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1. A method of classifying a cardiac response to pacing, comprising:
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delivering a first pacing pulse to an atrium during a first cardiac cycle; sensing for an atrial evoked response following delivery of and associated with the first atrial pacing pulse sensing for an intrinsic activation of a ventricle during the first cardiac cycle; delivering a pacing pulse to the ventricle if the intrinsic ventricular activation is not sensed during the first cardiac cycle; sensing in the atrium for a retrograde P-wave, the retrograde P-wave responsive to the ventricular pacing pulse or the intrinsic ventricular activation; classifying the cardiac response to the first atrial pacing pulse as a non-captured response if the retrograde P-wave is detected and the atrial evoked response is not detected; and classifying the cardiac response to the first atrial pacing pulse as a captured response if the atrial evoked response is detected and the retrograde P-wave is not detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A cardiac system, comprising:
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first means for delivering a first pacing pulse to an atrium during a first cardiac cycle; means for sensing for an atrial evoked response following delivery of and associated with the first atrial pacing pulse; means for sensing for an intrinsic activation of a ventricle during the first cardiac cycle; means for delivering a pacing pulse to the ventricle if the intrinsic ventricular activation is not sensed during the first cardiac cycle; means for sensing in the atrium for a retrograde P-wave, the retrograde P-wave responsive to the ventricular pacing pulse or the intrinsic ventricular activation; means for classifying the cardiac response to the first atrial pacing pulse as a non-captured response if the retrograde P-wave is detected and the atrial evoked response is not detected, and for classifying the cardiac response to the first atrial pacing pulse as a captured response if the atrial evoked response is detected and the retrograde P-wave is not detected. - View Dependent Claims (16, 17, 18, 19)
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Specification