Statistical Analysis
Baseline patient characteristics were compared using a T-test between the two steerable sheath groups. A hierarchical regression analysis was performed for the procedural parameters (mean CF, RF time per lesion, CF variability) using a linear-mixed effect model by adjusting for individual lesions and each patient on R software (version 1.1, RStudio Inc, Boston, MA). Time-sequence data to determine inefficient contact lesions was analysed using MATLAB (version 9.4, MathWorks, Natick, MA); significance was evaluated using a F-test on R.