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Determination of phrenic nerve stimulation threshold

  • US 8,958,876 B2
  • Filed: 02/28/2013
  • Issued: 02/17/2015
  • Est. Priority Date: 03/27/2012
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • testing for phrenic nerve stimulation (PS) threshold, including;

    pacing a heart with cardiac paces at a pacing output level;

    sensing a physiological signal for use in detecting PS beats, wherein the PS beats are cardiac paces that induce phrenic nerve stimulation; and

    monitoring for PS beats in the sensed physiological signal to detect if the pacing output level causes PS beats;

    if PS beats are detected at the pacing output level, analyzing the detected PS beats using criteria to determine if the pacing output level can be declared to be the PS threshold; and

    if the pacing output level cannot be declared to be the PS threshold based on the analysis of the PS beat at the pacing output level, performing a PS beat confirmation procedure including;

    delivering additional cardiac paces at the pacing output level to generate additional PS beats; and

    analyzing the detected PS beats using other criteria to determine if the pacing output level can be confirmed as the PS threshold.

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