Patent ID: 8768490

Claim:
An electrode catheter for cardiac therapy, comprising: an elongated, tube-type catheter body; a ring electrode disposed before a distal end of the electrode catheter for the delivery and/or measurement of an electrical electrocardio signal by way of an outer electrode contact surface thereof; and a supply lead for the electrical connection of the ring electrode, wherein the ring electrode is mounted on the catheter body such that it can be displaced relative thereto in a longitudinal axial direction, wherein the electrode catheter further comprises a drive device, by way of which the ring electrode can be displaced from a proximal end of the electrode catheter in the implanted state thereof, and wherein the drive device is formed by a connection coil of the ring electrode, which is wound openly at least on a partial length, wherein an advancing element located close before the ring electrode is engaged with the connection coil in the region of the open winding such that rotation of the connection coil induces a change in the length thereof and, therefore, axial displacement of the ring electrode.