An electrode catheter for use with an endocardial ablation catheter, wherein the electrode catheter receives the transmitted energy for ablating a portion of the heart. The electrode catheter comprises a proximal portion, a distal portion, and a longitudinal structure there between； and an electrode in communication with said electrode catheter, wherein said electrode receives the transmitted energy from the endocardial ablation catheter, or alternatively an epicardial ablation catheter.
