Catheter system

An electrode catheter system comprising:

• a handle having a housing and a longitudinal axis,
• an elongate, hollow flexible shaft having a proximal end connected to the handle and a distal end remote from the handle, a deflectable segment of the shaft being deflectable relative to a remaining segment of the shaft;
• a shaft actuator associated with the handle for selectively deflecting the deflectable segment of the catheter shaft, the shaft actuator at least in part comprising a first shuttle disposable within and moveable longitudinally relative to the handle housing;
• a shaft pull wire extending within the catheter shaft and being connected to the deflectable segment of the catheter shaft, the shaft pull wire being operatively coupled to the first shuttle such that actuation of the shaft actuator drives longitudinal movement of the first shuttle relative to the handle housing so as to pull on the shaft pull wire to deflect the deflectable segment of the catheter shaft;
• an electrode component carried by the catheter shaft and being configurable from a collapsed configuration to an expanded configuration;
• an electrode pull wire separate from the shaft pull wire and extending at least in part within the shaft and being operatively coupled to the electrode component;
• a second shuttle disposed within and moveable longitudinally relative to the handle housing, the second shuttle also being moveable longitudinally relative to the first shuttle, the electrode pull wire being operatively coupled to the second shuttle, said second shuttle being responsive to longitudinal movement of the first shuttle to move longitudinally relative to said first shuttle so as to inhibit slack from forming in the electrode pull wire.