An apparatus for targeting a desired target site on a body tissue that separates a first body cavity from a second body cavity of a patient includes a catheter having a longitudinally extending catheter lumen and adapted to provide access to the first body cavity. The suture welding device has a working end, a suture contacting element disposed on the working end, a first electrode electrically coupled to the electrosurgical energy source, and a second electrode electrically coupled to the electrosurgical energy source. The motor scrolls the film in front of the first aperture.