Basket catheter with deflectable spine

摘要

A catheter adapted for mapping and/or ablation in the atria has a basket-shaped electrode array with two or more location sensors with a deflectable expander. The catheter has comprises a catheter body, a basket electrode assembly at a distal end of the catheter body, and a control handle at a proximal end of the catheter body. The basket electrode assembly has a plurality of electrode-carrying spines and an expander that is adapted for longitudinal movement relative to the catheter body for expanding and collapsing the assembly via a proximal end portion extending past the control handle that can be pushed or pulled by a user. The expander is also adapted for deflection in responsive to an actuator on the control handle that allows a user to control at least one puller wire extending through the catheter body and the expander.

主权项

1. A catheter comprising:
an elongated catheter body having proximal and distal ends and at least one lumen therethrough; an electrode assembly at the distal end of the catheter body, the electrode assembly having proximal and distal ends and comprising a plurality of spines, the spines comprising a plurality of electrodes, each spine comprising a bowed portion carrying the plurality of electrodes and a generally straight distal portion, the bowed portion extending at an angle of about 30 degrees to about 80 degrees from the generally straight distal portion; an expander having proximal and distal ends, the expander forming a longitudinal axis of the electrode assembly, the spines being attached at their proximal ends to the distal end of the catheter body and at their distal ends to the expander; at least one puller wire that extends through the expander, the puller wire having a distal end anchored in the expander at a location distal of the distal end of the catheter body and proximal of the distal end of the electrode assembly; and a control handle proximal of the catheter body, the control handle having an actuator adapted to move the at least one puller wire, wherein the electrode assembly has an expanded arrangement when the expander is moved proximally along the longitudinal axis relative to the catheter body and the electrode assembly has a collapsed arrangement when the expander is moved distally along the longitudinal axis relative to the catheter body, and wherein the expander is adapted to deflect in at least one direction when the at least one puller wire is moved by the actuator.