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Hemodynamically unstable ventricular arrhythmia detection

  • US 10,350,426 B2
  • Filed: 08/07/2018
  • Issued: 07/16/2019
  • Est. Priority Date: 12/23/2014
  • Status: Active Grant
First Claim
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1. A method comprising:

  • sensing a first cardiac electrical signal;

    detecting a ventricular tachyarrhythmia from the first cardiac electrical signal;

    obtaining, from an activity sensor, an activity sensor signal, the activity sensor signal correlated to patient activity and comprising heart motion signals;

    determining an activity metric from the activity sensor signal;

    comparing the activity metric to an unstable rhythm threshold;

    confirming the detected ventricular tachyarrhythmia as being a hemodynamically unstable rhythm based on the activity metric being less than the unstable rhythm threshold; and

    withholding anti-tachycardia pacing (ATP) in response to confirming the hemodynamically unstable rhythm.

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