ELECTRODE CATHETERS

Abstract

An electrode catheter includes a shaft that is inserted into a body and an electrode array 16 provided at a distal end of the shaft. The electrode array 16 includes a plurality of splines 24a to 24f, each enclosing at least one electrode 26, and a distal end element connected to a distal end face of the plurality of splines 24a to 24f. Each of the plurality of splines 24a to 24f is deformable into a fan shape, which, viewed from the axial direction of the shaft, has arcuate regions 28a to 28f along a common virtual circle 50. When each of the plurality of splines 24a to 24f is in the fan shape, the plurality of arcuate regions 28a to 28f formed by the plurality of splines 24a to 24f as a whole occupies 80% or more of the circumference of the virtual circle 50.