Patent ID: 8641710

Claim:
A system for heat ablation of a tissue wall of a patient, the system comprising: a first assembly configured to be positioned at a first side of the tissue wall, wherein the first assembly comprises: a first magnetic member comprising a magnetic source that provides a first magnetic field; a first electrode surface; and a first electrical lead electrically coupled with the first electrode surface so as to be capable of communicating electrical signals thereto; and a second assembly configured to be positioned at a second side of the tissue wall opposite the first side of the tissue wall, wherein the second assembly comprises: a second magnetic member configured to magnetically interact with the first magnetic field so as to be attracted to the first magnetic member; a second electrode surface; and a second electrical lead electrically coupled with the second electrode surface so as to be capable of communicating electrical signals thereto, wherein each of the first and second electrode surfaces are positioned relative to the first and second assemblies so as to contact the first and second sides of the tissue wall, respectively, due to the magnetic interaction of the second magnetic member with the first magnetic field, wherein one of the first and second assemblies is a leading assembly and the other of the first and second assemblies is a tracking assembly, wherein the leading assembly comprises an elongated positioning device that comprises a proximal portion that can be manipulated at an exterior of the patient to control movement of the magnetic member and the electrode surface of the leading assembly in any direction along a surface of the tissue wall, wherein the elongated positioning device comprises a rigid catheter, and wherein the tracking assembly is configured to dynamically track a position of the leading assembly as the leading assembly is moved via the positioning device in any direction along the surface of the tissue wall to maintain contact between the first electrode surface and the first side of the tissue wall and to maintain contact between the second electrode surface and the second side of the tissue wall, due to the magnetic interaction of the second magnetic member with the first magnetic field, as the first and second assemblies move relative to the tissue wall.