Linear ablation assembly

The intravascular assembly of claim 26 wherein the distal section of the elongated delivery member is shaped to facilitate entry and positioning within the patient's heart chamber.

The intravascular assembly of claim 26 wherein the electrodes on the distal portion of the electrophysiological device are not more than 1.35 mm in diameter.

The intravascular assembly of claim 26 including a longitudinally movable sheath disposed about the delivery member to control the length of an elongated opening.

The intravascular assembly of claim 26 including a longitudinally movable sheath disposed about the EP device having a proximal end configured to be connected to a source of fluid and a distal end extending over the distal extremity of the EP device.

The intravascular assembly of claim 26 including a second inner lumen extending within at least the distal section of the elongated delivery member to a discharge port in the distal end of the elongated delivery member.

The intravascular assembly of claim 26 including a longitudinally movable outer sheath disposed about the intravascular device to control the length of the elongated opening which is exposed.

The intravascular assembly of claim 26 wherein the elongated delivery member is provided with at least one electrode on the distal section thereof.

The intravascular assembly of claim 26 wherein the distal section of the elongated delivery member is provided with a lumen for delivery of cooling fluid to the distal end of the assembly.

The intravascular assembly of claim 26 including an elongated deflection line secured to the distal end of the delivery member.

17-25. (canceled)

An intravascular assembly for forming a continuous lesion within a chamber of a patient's heart, comprising:

• a) an elongated delivery member having proximal and distal ends, an inner lumen extending therein to the distal end, a distal section having an elongated support element which is fixed along a length of the distal section;
• and
• b) an elongated electrophysiological device disposed within the inner lumen of the elongated delivery member, having a distal end secured within the distal end of the elongated delivery member, and having a plurality of emitting electrodes on a distal portion thereof, and which is configured to extend away from the distal section, a plurality of electrical conductors having proximal and distal ends with individual electrical conductors being electrically connected by their distal ends to emitting electrodes on the distal portion of the electrophysiological device and by their proximal ends to an electrical connector suitable for connection to a source of high frequency electrical energy.