Efficacy and safety of a novel temperature‐controlled catheter for cavotricuspid isthmus ablation

Background Maintaining an adequate temperature at the target site is essential for effective ablation. We hypothesized that a tissue temperature‐controlled (T‐Con) catheter for cavotricuspid isthmus (CTI) ablation could improve the procedural ablation parameters. Purpose To evaluate the efficacy and safety of the T‐Con (DiamondTemp™) catheter for CTI ablation compared with non‐irrigation (Non‐Irri) and irrigation (Irri) catheters. Methods We analyzed 150 patients who underwent prophylactic CTI ablation combined with pulmonary vein isolation. The Non‐Irri, Irri, and T‐Con catheter groups comprised 50 patients each, and the ablation procedural parameters and complications were compared between these groups. Results There were no significant differences in clinical background characteristics among the three groups. The Kruskal–Wallis and post hoc tests demonstrated that the T‐Con group showed the lowest total radiofrequency energy delivery time among the three groups (median [25 and 75 percentiles]: 340 [209, 357], 147 [100, 199], and 83 [61, 109] s, respectively in the Non‐Irri, Irri, and T‐Con groups; T‐Con versus Non‐Irri, p