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.