Patent ID: 6972016

Claim:
An electrophysiology device configured to be delivered through an inner lumen of a guide catheter to a desired intracorporeal location, comprising: a) an elongated shaft which has a proximal shaft section and a distal shaft section, the distal shaft section having a helically shaped proximal portion with at least one turn and a plurality of ablation electrodes and a straight distal portion extending distally from the proximal portion with no ablation electrodes; b) a centrally disposed inner core member which extends through the proximal portion of the distal shaft section and at least part of the distal portion, which is formed at least in part of superelastic NiTi alloy, which is in part in the shape of a helical coil to thereby cause the proximal portion of the distal shaft section to take a helical shape with at least one loop having operative transverse dimensions in an unstressed condition and which is in part straight to thereby cause the distal portion to extend straight from the helical coil.