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Method and apparatus for detecting oscillations in cardiac rhythm with electrogram signals

  • US 20050256542A1
  • Filed: 07/19/2005
  • Published: 11/17/2005
  • Est. Priority Date: 03/26/2002
  • Status: Active Grant
First Claim
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1. A cardiac rhythm management device, comprising:

  • a sensing channel for generating an electrogram waveform;

    a controller programmed to extract a feature from the electrogram waveform during successive cardiac cycles and to detect electrical alternans by determining if a beat-to-beat oscillation above a specified threshold exists with respect to the extracted feature;

    pacing channels configurable for delivering cardiac resynchronization therapy;

    wherein the controller is programmed to either initiate or modify the delivery of cardiac resynchronization therapy if electrical alternans is detected.

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