Comparison of three different approaches to very high‐power short‐duration ablation using the QDOT‐MICRO catheter

摘要

Abstract Background/Objectives The QDOT‐MICRO? catheter allows very high‐power and short‐duration (vHPSD) ablation. This study aimed to investigate lesion characteristics using different ablation settings. Methods Radiofrequency applications (90?W/4?s, temperature‐control mode with 55°C or 60°C target) were performed in excised porcine myocardium using three different approaches: single (SA), double nonrepetitive (DNRA), and double repetitive applications (DRA). Applications were performed with an interval of 1?min for DNRA, and without interval for DRA. Results A total of 480 lesions were analyzed. Lesion depth and volume were largest for DRA followed by DNRA and SA regardless of catheter direction (depth: 3.8 vs. 3.3 vs. 2.6?mm, p?