Ablation Lesion Data Analysis
The STSF catheter was used for acquisitions of FTI/AI and ablation lesion data. The calibration of the STSF catheter was performed every 20 minutes. The settings of the automatic lesion annotation software (VISITAGTM Module, Biosense Webster) were as follows: for location stability, minimum time was 3 seconds and maximum range 3.0 mm; force over time was 25% with a minimum force of 3 g. The lesion tag size was a 2 mm radius. The parameters for each VISITAGTM ablation point were as follows: RF application time, average CF, RF power, impedance drop (the difference between the pre-ablation and the lowest recorded impedance values during ablation), FTI, and AI. The data were compared between FTI and TAI protocols.