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Capture management during left ventricular pacing therapy in a cardiac medical device and medical device system

  • US 10,391,318 B2
  • Filed: 07/28/2016
  • Issued: 08/27/2019
  • Est. Priority Date: 07/31/2015
  • Status: Active Grant
First Claim
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1. A method of determining capture during delivery of a ventricular pacing therapy in a medical device system, comprising:

  • sensing a subcutaneous cardiac signal and emitting a trigger signal in response to the sensed cardiac signal;

    delivering the ventricular pacing therapy to the left ventricle in response to the emitted trigger signal;

    comparing a beat of the subcutaneous cardiac signal sensed subsequent to the ventricular pacing therapy being delivered to the left ventricle to a baseline intrinsic template associated with a non-paced beat; and

    determining whether the delivered ventricular pacing therapy captures the left ventricle in response to the comparing;

    determining whether the device is in a VDD pacing mode or a VVI pacing mode;

    determining a timing window including the sensed beat in response to determining whether the device is in the VDD pacing mode or the VVI pacing mode;

    wherein the comparing step comprises comparing the sensed beat within the timing window to the baseline intrinsic template and determining a correlation between the sensed beat within the timing window and the baseline intrinsic template; and

    wherein the step of determining whether the delivered ventricular pacing therapy captures the left ventricle comprises determining whether the delivered ventricular pacing therapy captures the left ventricle in response to the correlation.

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