Kenta Tsutsui, Hitoshi Mori, Daisuke Kawano, Naomichi Tanaka, Yoshifumi Ikeda, Naokata Sumitomo, Shiro Iwanaga, Shintaro Nakano, Toshihiro Muramatsu, Kazuo Matsumoto, Ritsushi Kato
BACKGROUND: A novel irrigation catheter (QDOT MICRO™) has been introduced, which enables a surface temperature-controlled ablation combined with tip cooling. However, the detailed description of its complex behavior and effect on the incidence of pops and lesion formation remains elusive. This study aimed to systematically investigate the ablation characteristics, feedback behavior, and incidence of steam pops in a simplified ex vivo swine model. METHODS: Using swine ventricular tissue perfused with saline at 37°C, we systematically created lesions with 4×3 combinations of the wattage (20, 30, 40, and 50 W) and contact force (CF, 10, 30, and 50 g)...
October 12, 2022: Pacing and Clinical Electrophysiology: PACE