1. A method for placing at least one catheter for atrial fibrillation ablations, comprises: providing a computer based system configured and programmed for superimposing live fluoroscopic images and recorded fluoroscopic images such that an operator can adjust transparency between said live fluoroscopic images and recorded fluoroscopic images for placing said at least one catheter; recording a series of high resolution images utilizing fluoroscopy with contrast medium (“dye”) injection, utilizing optical charter recognition as a switch for automatically recording only when the fluoroscope is on; choosing or selecting an appropriate recorded image from said series of high resolution images utilizing fluoroscopy with contrast medium (“dye”) injection; and placing said at least one catheter utilizing said recorded image from said series of high resolution images utilizing fluoroscopy with contrast medium (“dye”) injection, and live fluoroscope image superimposed on top of each other with a transparency of the recorded image and live image, wherein transparency may be adjusted by an operator relative to said recorded image and said live image, for guiding placement of said at least one catheter.