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 <.01; T‐Con versus Irri, p <.01). The total procedural time and acute reconnection rate in the T‐Con group (264 s and 4%, respectively) were lower than those in the Non‐Irri group (438 s and 24%) but were similar to those in the Irri group (268 s and 6%). No significant complications were observed in any group. Conclusions: The T‐Con catheter achieved a short energy delivery time and a low acute reconnection rate, indicating its potential as an alternative catheter for CTI ablation. [ABSTRACT FROM AUTHOR]