Inclusion Criteria:  Patients aged between 20 and 80 years of age who have appropriate indication for catheter ablation for AF AF patients with left atrium diameter <55 mm Antiarrhythmic drug-resistant AF Anticoagulation eligible patients  Exclusion Criteria:  AF associated with severe cardiac malformation or structural heart disease Patients undergoing treatment for cognitive disorders, emotional disorders, and anxiety disorders Patients with severe renal dysfunction or difficulty in CT imaging using contrast media Patients with a previous history of AF ablation or other open heart surgery Patients with active internal bleeding Anticoagulant therapy not eligible patients Valvular AF (mitral valve stenosis>grade 2, mechanical valve, mitral valve reconstruction) Significant comorbidities Patients with an expected survival period of less than 1 year Drug or alcohol addiction patients Among eligible persons, those who cannot read the consent form (illiteracy, foreigners, etc.) Patients judged to be unsuitable for participation in clinical research based on the judgment of other researchers