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Method and apparatus for accurate separation of supraventricular tachycardia from ventricular tachycardia during posture changes

  • US 9,486,637 B2
  • Filed: 07/24/2014
  • Issued: 11/08/2016
  • Est. Priority Date: 07/24/2014
  • Status: Active Grant
First Claim
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1. A method performed by an implantable medical device, comprising:

  • sensing a first cardiac signal during a known cardiac rhythm from each of a plurality of available sensing vectors,generating, for each of the plurality of available sensing vectors, a plurality of morphology templates of the first cardiac signal for each of a plurality of patient postures;

    sensing a second cardiac signal during an unknown cardiac rhythm using one or more of the plurality of available sensing vectors;

    comparing the second cardiac signal to at least a portion of the plurality of morphology templates without determining a current posture of the patient;

    detecting the unknown cardiac rhythm as supraventricular tachycardia in response to the second cardiac signal matching at least one of the plurality of morphology templates;

    detecting the unknown cardiac rhythm as ventricular tachycardia in response to the second cardiac signal not matching any of the plurality of morphology templates; and

    delivering a stimulation therapy in response to detecting the ventricular tachycardia.

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