| abstract |
SUMMARY The present invention provides a system and method for selectively applying electrical energy to a target location within a patient's heart to remove calcified deposits and fibrous material from valve leaflets. The method of the present invention positions an electrosurgical probe or catheter (10) proximate a target site such that one or more electrode terminals (58) at least partially contact or approximate a target heart valve. Prepare to do. A high frequency voltage is then applied between the electrode terminals and one or more return electrodes (112) to volumetrically remove or ablate at least a portion of the calcified material while minimizing damage to the heart valve. , Substantially protecting the elastic fiber layer of the valve leaflet. |