Electrophysiology system and methods

  • US 9,757,191 B2
  • Filed: 09/26/2014
  • Issued: 09/12/2017
  • Est. Priority Date: 01/10/2012
  • Status: Active Grant
First Claim
Patent Images

1. An electrophysiology method comprising:

  • advancing a distal portion of an ablation catheter intravascularly to a location proximate myocardial tissue within a chamber of a heart, the distal portion of the ablation catheter including;

    a tissue ablation electrode configured to apply ablation energy to the myocardial tissue;

    a plurality of microelectrodes circumferentially distributed about the tissue ablation electrode and electrically isolated therefrom, the plurality of microelectrodes defining a plurality of bipolar microelectrode pairs, each bipolar microelectrode pair configured to generate an output signal based on a cardiac activation signal;

    acquiring the output signals from each of the bipolar microelectrode pairs;

    comparing an amplitude of the output signal from each of the bipolar microelectrode pairs to the amplitudes of the output signals from the other of the plurality of bipolar microelectrode pairs; and

    displaying to a clinician a visual indication of a proximity of the tissue ablation electrode to the myocardial tissue, the visual indication including;

    an indication that the tissue ablation electrode is in contact with the myocardial tissue if, based on the comparison between the amplitudes of the output signals, a difference between the amplitude of any one of the output signals and the amplitude of any one or more of the other output signals exceeds a predetermined threshold; and

    an indication that the tissue ablation electrode is not in contact with the myocardial tissue if, based on the comparison between the amplitudes of the output signals, the difference between the amplitude of any one of the output signals and the amplitude of any one or more of the other output signals does not exceed a predetermined threshold.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×