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Cardiac response classification using multisite sensing and pacing

  • US 8,843,199 B2
  • Filed: 08/26/2013
  • Issued: 09/23/2014
  • Est. Priority Date: 12/12/2003
  • Status: Active Grant
First Claim
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1. A method of determining a cardiac response to a pacing pulse, comprising:

  • delivering two or more initialization pacing pulses to the heart using a first electrode combination of a plurality of electrodes that are electrically coupled to a heart;

    sensing for a cardiac response following each of the two or more initialization pacing pulses using a second electrode combination;

    for each of the two or more initialization pacing pulses, determining a delay interval between when the initialization pacing pulse was delivered using the first electrode combination until when a corresponding cardiac response was sensed using the second electrode combination;

    following delivery of the two or more initialization pacing pulses;

    delivering a pacing pulse to the heart using the first electrode combination;

    sensing a cardiac response to the pacing pulse using the second electrode combination; and

    classifying the cardiac response to the pacing pulse as one of a captured response and a non-captured response, the classifying step including;

    determining if the sensed cardiac response to the pacing pulse has a predetermined characteristic that falls within a classification window, the pre-determined characteristic comprising a peak amplitude that exceeds a pre-determined threshold and wherein the classification window begins after a predetermined time delay following the pacing pulse and extends for a window duration, wherein the predetermined time delay is chosen based at least in part on the determined delay intervals of each of two or more of the initialization pacing pulses.

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