| 摘要 |
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 (105) located at the distal tip section of a catheter shaft (101) for contacting an inner wall on the annular organ structure (152), and a needle electrode (109) at or within the flexible tissue contactor means for penetrating into the tissue, wherein the needle electrode (109) is deployable out of the tissue contactor in a manner essentially perpendicular to a longitudinal axis of the catheter shaft (101).
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