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Using device based electrograms to identify bundle branch block morphology

  • US 8,954,138 B2
  • Filed: 11/15/2012
  • Issued: 02/10/2015
  • Est. Priority Date: 11/16/2011
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a processor circuit, configured to;

    receive or determine a QRS duration representative of a time duration of a QRS complex;

    receive or determine an RV activation duration representative of a time duration between (1) an onset of the QRS complex, and (2) an R-wave in a right ventricle;

    determine whether the QRS duration exceeds a first threshold value and, when the QRS duration exceeds the first threshold value, determine at least one of;

    (1) whether the RV activation duration is shorter than a second threshold value; and

    (2) whether a ratio or differential relationship of the RV activation duration to the QRS duration is less than a third threshold value; and

    provide an indication of left ventricular conduction dysfunction when it is determined that (1) the RV activation duration is shorter than second threshold value;

    or (2) the ratio or differential relationship of the RV activation duration to the QRS duration is less than the third threshold value.

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