Devices and methods are provided for creating lesions in endocardial tissues
surrounding a vessel opening to thereby isolate focal arrhythmia substrates, including
an invasive catheter assembly comprising an elongate body having a longitudinal
axis and first and second lumens, a first catheter having a distally mounted expandable
anchor body disposed in the first lumen, and a second catheter having a distally
mounted electrode disposed in the second lumen, the elongate body having a first
distal opening accessing the first lumen through which the first catheter may be
extended axially relative to the longitudinal axis of the elongate body and a second
distal opening accessing the second lumen through which the second catheter may
be extended at an angle relative to the longitudinal axis of the elongate body.
The disclosed invention also includes an elongate catheter having an expandable
electrode body mounted on one end, wherein the electrode body is configured to
form an enlarged circumferential region when expanded, the enlarged circumferential
region defining a distal facing surface of the electrode body, the distal facing
surface including an area configured to emit radio frequency (RF) energy.
