DEVICE AND METHOD FOR MULTI-PHASE RADIO-FREQUENCY ABLATION

摘要

Multi-phase RF ablation employing a two-dimensional or three-dimensional electrode array (501) products a multitude of currents paths on the surface of the ablation zone. This results in a unifor m lesion with a size defined by the span of the electrode array. An orthogonal electrode catheter array suitable for cardiac ablation is used in conjunction with a two-phase RF power source to produce uniform square-shaped lesions of size 1,2 cm2. Lesions of larger size are created by successive adjacent placement of the square-shaped lesions. A temperature sensor (531) at the electrode tip allows monitoring of ablation tem- perature and regulation thereof to minimize the electrode tips from being fouled by coagulum.