Thickness Map-Guided vs. Empirical PV Isolation Using Pulsed Field Ablation for Paroxysmal AF

* Patient with paroxysmal atrial fibrillation who is scheduled for ablation procedure and ≥19 and ≤80 years of age * Left atrium size \< 50mm * paroxysmal atrial fibrillation that is recurrence during antiarrhythmic drug treatment or is not able to use an antiarrhythmic drug. * Patient who is indicated for anticoagulation therapy (for prevention of cerebral infarction) Exclusion Criteria: * Patients with persistent or permanent atrial fibrillation * Atrial fibrillation associated with severe cardiac malformation or a structural heart disease that is hemodynamically affected * Patients with severe renal impairment or CT imaging difficulty using contrast media * Patients with a past history of radiofrequency ablation for atrial fibrillation or other cardiac surgery * Patients with active internal bleeding * Patients with contraindications for anticoagulation therapy(for prevention of cerebral infarction) and antiarrhythmic drugs * Patients with valvular atrial fibrillation (mitral stenosis \>grade 2, mechanical valve, mitral valvuloplasty) * Patients with a severe comorbid disease * Expected survival \< 1 year * Drug addicts or alcoholics * Patients who cannot read the consent form (illiterates, foreigners, etc.) * Other patients who are judged by the principal or sub-investigator to be ineligible for participation in this clinical study