Retrograde Atrial Sensing for Identifying Sub-Threshold Atrial Pacing
First Claim
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1. A method, comprising:
- performing atrial capture threshold testing in accordance with an atrial capture threshold testing schedule;
monitoring for retrograde P-waves at least during times other than times during which scheduled atrial capture threshold testing is performed;
detecting, during the monitoring, a retrograde P-wave indicative of sub-threshold atrial pacing;
performing an unscheduled atrial capture threshold test in response to detecting the retrograde P-wave; and
adjusting pacing of the atrium based on the unscheduled atrial capture threshold test.
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Abstract
Atrial capture threshold testing is performed in accordance with an atrial capture threshold testing schedule. Monitoring for retrograde P-waves occurs at least during times other than times during which scheduled atrial capture threshold testing is performed. In response to detecting a retrograde P-wave indicative of sub-threshold atrial pacing during monitoring, an unscheduled atrial capture threshold test is performed and pacing of the atrium is adjusted based on the unscheduled atrial capture threshold test.
92 Citations
25 Claims
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1. A method, comprising:
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performing atrial capture threshold testing in accordance with an atrial capture threshold testing schedule; monitoring for retrograde P-waves at least during times other than times during which scheduled atrial capture threshold testing is performed; detecting, during the monitoring, a retrograde P-wave indicative of sub-threshold atrial pacing; performing an unscheduled atrial capture threshold test in response to detecting the retrograde P-wave; and adjusting pacing of the atrium based on the unscheduled atrial capture threshold test. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method, comprising:
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performing atrial capture threshold testing in accordance with an atrial capture threshold testing schedule; monitoring for retrograde P-waves at least during times other than times during which scheduled atrial capture threshold testing is performed; detecting, during the monitoring, a retrograde P-wave indicative of sub-threshold atrial pacing; performing an unscheduled atrial capture threshold test in response to detecting the retrograde P-wave; and storing data associated with performance of the unscheduled atrial capture threshold test. - View Dependent Claims (13, 14, 15)
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16. A system, comprising:
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a plurality of implantable electrodes configured for cardiac electrical activity sensing and cardiac pacing; a housing configured for implantation in the patient; detection circuitry provided in the housing and configured to detect retrograde P-waves indicative of sub-threshold atrial pacing, and a controller provided in the housing and configured to perform atrial capture threshold testing in accordance with an atrial capture threshold testing schedule, the controller configured to perform an unscheduled atrial capture threshold test in response to the detecting circuitry detecting a retrograde P-wave during a time other than a time during which scheduled atrial capture threshold testing is performed, the controller configured to adjust pacing of the atrium based on the unscheduled atrial capture threshold test. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification