Atrial fibrillation ablation protocol
Data were collected from the PiLOT-AF trial (P ower, L esion Size Index and O esophageal T emperature Alerts duringA trial F ibrillation ablation)8, which was a randomised study enrolling patients undergoing their first LA ablation for symptomatic paroxysmal or persistent atrial fibrillation (AF) (see supplementary materials section for more details).
Tissue contact force, FTI, and LSI were sampled at 100 Hz, displayed in real time during ablation and automatically recorded for further analysis. Tissue impedance was measured between the tip of the ablation catheter and the ground patch (on the patient’s left thigh) by using a 50kHz current at the same sampling rate of 100 Hz.
Any steam pops occurring during the procedures were noted.