RF energy delivery system and method

An ablation catheter comprising:

• an elongate shaft comprising a proximal section and a distal section, wherein the proximal section has a first durometer and the distal section has a second durometer;
• a joint adapted to join the proximal section to the distal section in an eccentric fashion such that the proximal section and distal section each occupy an unequal portion of a diameter of the elongate shaft at the joint, the joint configured to cause the elongate shaft to assume a first geometry when deflected in a first direction relative to the joint and to assume a second geometry when deflected in a second direction relative to the joint, the first geometry being different than the second geometry;
• at least one steering wire configured to deflect the elongate shaft;
• and
• at least one electrode positioned along the elongate shaft, the at least one electrode configured to deliver ablation energy to tissue.