<p>Method and apparatus for ablating target tissue adjacent pulmonary veins of a patient. The ablation device (30) can include a lower jaw assembly (32) including a proximal jaw (42) having a proximal electrode (50) and a distal jaw (62) having a distal electrode (70), and an upper jaw assembly (90) including an upper jaw (94) having an upper electrode (98). A proximal actuator (54) can be movable between a first position in which the proximal jaw is open and a second position in which the proximal jaw is clamped with respect to the upper jaw. A distal actuator (76) can be movable between a third position in which the distal jaw is open and a fourth position in which the distal jaw is clamped with respect to the upper jaw.</p>
