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We evaluated the clinical effectiveness and safety of a HP and short-duration (HPSD) method for atrial fibrillation (AF) ablation. A hundred and fifty patients [58.2 ± 10.0 years, 48% with paroxysmal AF (PAF)] scheduled for index AF ablation using a CF-sensing catheter were arbitrarily assigned to three groups [30 W, 40 W, and 50 W at ablation sites of anterior, roofing, and substandard segments of pulmonary vein (PV) antra and roofing range between each upper PV]. In 25-30 W for ≤20 s was app