Representative complex fractionated atrial electrogram (CFAE) maps created over 10 min on the NavX 3-dimensional mapping system. The red areas are variable CFAE sites with a mean fractionated interval of 50–120 ms. Locations of the CFAE sites on the maps obtained at 5 and 10 min are similar to those on the baseline maps. AP: anteroposterior, LAA: left atrial appendage, LIPV: left inferior pulmonary vein, LSPV: left superior pulmonary vein, PA: posteroanterior, RIPV: right inferior pulmonary vein, RSPV: right superior pulmonary vein.