Patent ID: 8043288

Claim:
A catheter assembly comprising: a control handle at a proximal end of the catheter assembly; a catheter shaft attached to the control handle and extending distally therefrom; a virtual electrode structure provided within a distal end section of the catheter shaft; a fluid lumen defined within the catheter shaft extending distally into the distal end section, wherein the fluid lumen is in fluid communication with the virtual electrode structure; and at least one control mechanism interconnected between the distal end section of the catheter and the control handle, the at least one control mechanism including an actuator; wherein upon actuation of the at least one control mechanism at the control handle, at least a portion of the distal end section of the catheter shaft is caused to form a curved section, the actuator deflecting to move a first sled and pull a first deflection wire thereon while a second sled remains stationary, wherein the first sled is operatively coupled to the actuator by a toothed rack and a pinion gear, and wherein upon further manipulation of the at least one control mechanism, the radius of the curved section is variable.