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Retrograde atrial sensing for identifying sub-threshold atrial pacing

  • US 8,155,741 B2
  • Filed: 11/21/2008
  • Issued: 04/10/2012
  • Est. Priority Date: 05/25/2005
  • Status: Active Grant
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;

    adjusting pacing of the atrium based on the unscheduled atrial capture threshold test; and

    generating a retrograde P-wave template indicative of retrograde conduction, wherein detecting the retrograde P-wave during monitoring comprises identifying the retrograde P-wave using the generated retrograde P-wave template.

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