A medical device comprising: a catheter having a distal end and a catheter shaft a braided conductive member comprising a plurality of filaments, the braided conductive member disposed at the distal end of the catheter wherein: a first end of the braided conductive member is attached to the catheter shaft, a second end of the braided conductive member is attached to an activating shaft, and in a deployed configuration, the braided conductive member forms an annular tissue contact zone.