Abstract: A medical device for treating the hemorrhoid, or reducing the dilatation of cellular tissues comprising ligating a hemorrhoid tissue and heating the hemorrhoid tissue. In one embodiment, an elongate tubular shaft comprises at least one coil loop electrode arrangement disposed at the distal end portion of the shaft, a RF energy generating source, and a method for deploying a dilated ligature element to effect the pressure therapy for the hemorrhoid tissues.

Abstract: An ablation catheter system and methods for repairing an annular organ structure comprising high frequency ablation for the purposes of tightening and stabilizing a tissue. A catheter suitable for high frequency ablation comprises a flexible tissue-contactor means located at the distal tip section of a catheter shaft for contacting an inner wall of the annular organ structure, and a needle electrode means located at or within the flexible tissue-contactor means for penetrating into the tissue, wherein the needle electrode means is deployable out of the tissue-contactor means in a manner essentially perpendicular to a longitudinal axis of the catheter shaft.