Catheter for treatment of atrial flutter having single action dual deflection mechanism

A deflectable catheter, comprising:

• an elongated catheter body;
• a distal tip section having a hinged tube with a spine and at least one slot, the distal tip section adapted for distal deflection in a first direction away from the spine, the distal tip section having a lesser stiffness;
• an intermediate deflectable section between the catheter body and the distal tip section, the intermediate deflectable section adapted for proximal deflection in the first direction or a second direction, the intermediate section having a greater stiffness;
• a tip electrode;
• a control handle proximal of the catheter body;
• first and second puller wires extending through the catheter body, the intermediate deflectable section and the hinged tube, the first and second puller wires each having a distal end anchored at or near the tip electrode,
• wherein the distal tip section and the intermediate section are deflected with longitudinal movement of either of the first and second puller wires.

A deflectable catheter, comprising:

• an elongated catheter body;
• a distal tip section having a hinged tube with a spine and at least one slot, the distal tip section adapted for distal deflection in a first direction away from the spine, the distal tip section having a lesser stiffness;
• an intermediate deflectable section between the catheter body and the distal tip section, the intermediate deflectable section adapted for proximal deflection in the first direction or a second direction, the intermediate section having a greater stiffness;
• a tip electrode;
• a control handle proximal of the catheter body;
• first and second puller wires extending through the catheter body, the intermediate deflectable section and the hinged tube, the first and second puller wires each having a distal end anchored at or near the tip electrode and a proximal end anchored in the control handle, the respective distal end and proximal end of each puller wire being anchored in a diametrically opposite position,
• wherein the distal tip section and the intermediate section are deflected in opposite directions with longitudinal movement of the first puller wire, and the distal tip section and the intermediate section are deflected both in the first direction with longitudinal movement of the second puller wire.