CF-Guided Ablation
In the CF group, FTI or AI targets were used, depending on the time period of the ablation procedure. Real-time automated display of RF applications (Visitag®, Biosense Webster) was used with predefined settings of catheter stability (1.5 mm for 3 seconds) and minimum CF (25% of the time > 3 gram). Each inter-lesion distance was less than 6 mm. In patients who underwent FTI-guided ablation, operators followed the EFFICAS I-based CF guidelines (minimum 400 gs FTI).7 In AI-guided ablation, RF was delivered until an AI of ≥ 400 at the posterior wall and roof/bottom and ≥ 550 at the anterior wall was achieved, in accordance with the CLOSE protocol.8