Abstract: A catheter with an electrode assembly has a functional electrode located at a first position on the electrode assembly and a shunting electrode located proximal to the first position. Irrigation fluid carried by the catheter may be electrically coupled with a patient's blood through the shunting electrode. The shunting electrode may be used to reduce noise in an electrocardiogram signal that results from the pump used to supply the irrigation fluid.

Abstract: A catheter with an electrode assembly has a functional electrode located at a first position on the electrode assembly and a shunting electrode located proximal to the first position. Irrigation fluid carried by the catheter may be electrically coupled with a patient's blood through the shunting electrode. The shunting electrode may be used to reduce noise in an electrocardiogram signal that results from the pump used to supply the irrigation fluid.

Abstract: The present invention is directed to a stabilizing catheter for use with a cardiac reference catheter, having an elongated catheter body, a distal tip section, and a magnetic member that is situated in the distal tip section, wherein the magnetic member is adapted to attract the reference catheter and stabilize it from moving or shifting. Also included is a catheter stabilizing system, comprising a first catheter having a first magnetic member, a second catheter having a second magnetic member, wherein the magnetic members are attracted toward each to stabilize one of the catheters against movement while in use in a patient's body. Nonlimiting examples of suitable embodiments of the magnetic members include a permanent magnet, a ferromagnetic material or an electromagnet, or combinations thereof.