Figure 1
Fluoroscopic images during cryoballoon ablation of the (top) left atrial (LA) roof and (bottom) left atrial posterior wall (LAPW) bottom (PA view). The cryoballoon is shifted gradually on the LA roof or the LAPW bottom from the left superior pulmonary vein to the right superior pulmonary vein or from the left inferior pulmonary vein to the right inferior pulmonary vein in an overlapping manner.