An electrode catheter device with indifferent electrode for direct current tissue therapies is disclosed. An example of the catheter device has a flexible tubing with at least one ablation electrode. The catheter device also may also be used with a sheath for introducing the flexible tubing inside a patients body. An indifferent electrode on the sheath can provide a ground for a direct current (DC) pulse to deliver electrical energy and create an electrical field adjacent a tissue. Various other embodiments are also disclosed.
