patients ≥ 18 years of age

ehra class ≤ 2

documented history of paroxysmal, persistent, longstanding persistent or newly-diagnosed af prior to admittance for cardiac surgery

patients will have elective coronary surgery planned able of providing informed consent

patients ≥70 years of age

pregnancy patients with contraindications for oral anticoagulant agents

patients undergoing emergency operation

patients undergoing concomitant valve replacement

severely enlarged la (>50 mm) on echocardiography

prior af ablation or af surgery