Identification of focal activations and DFAs
All patients presented AF rhythm at the beginning of the procedure. Additionally, all CARTOFINDER maps were created prior to performing catheter ablation. None of the maps required reannotation of the electrograms. A total of 10,868 points (714 sites on the LA) were identified, with an average of 310.5 ± 128.1 points (20.4 ± 7.1 sites) per patient. Focal activations were recorded in all patients, and points with focal activations totaled 450 points (12.9 ± 9.5 points per patient). DFAs were identified in 50.4% of the focal activations. Distribution of focal activation and the DFAs of the LA regions are shown in Fig. 4. Focal activation was observed across the entire LA and was frequently identified in the inferior region. Many focal activations in the PV antrum and posterior region were classified as DFAs, whereas focal activations in the other regions were less likely to be DFAs.