A catheter system that includes a catheter element sized to pass through blood vessels to an organ of an animal. The distal end portion of the catheter element is capable of assuming and maintaining a curved configuration. A medical element is disposed with respect to the catheter element so as to interact therewith, the medical element being capable of assuming and maintaining a curved configuration. At least one ablating or mapping tool is disposed on the distal end portion of either the medical element or the catheter element, or both, for either mapping or ablating tissue in the organ when the distal end portion of the catheter system is disposed in the organ. The catheter system can include a hand grip for controlling the catheter system.
