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Multipolarity epicardial radiofrequency ablation

  • US 9,814,523 B2
  • Filed: 06/13/2014
  • Issued: 11/14/2017
  • Est. Priority Date: 01/05/2011
  • Status: Active Grant
First Claim
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1. A method of treating tissue, comprising:

  • ablating a first tissue region with a first portion of a medical device placed in contact with a surface of the tissue, the medical device including a plurality of arms, the first portion of the medical device including a first electrode, ablating the first tissue region including conducting an electrical current between the medical device and a return electrode separate from the medical device; and

    then ablating a second tissue region with a second portion of the medical device placed in contact with the surface of the tissue, the second tissue region substantially surrounding and being substantially continuous with the first tissue region, the first tissue region having a first tissue depth and the second tissue region having a second tissue depth that is greater than the first tissue depth, the second portion of the medical device including a second electrode and a third electrode, ablating the second tissue region including conducting an electrical current between the second electrode and the third electrode.

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