We describe the case of a 78 year-old male patient with multivessel disease who refused surgical revascularization. His resting ECG showed atrial fibrillation of unknown time of onset. He was admitted for elective coronary intervention. Once angioplasty with stenting was done to his proximal Right coronary artery and TIMI III was obtained, normal sinus rhythm was immediately restored and maintained. We believe and also as shown in previous reports that ischemia in the right coronary artery distribution is associated with a high incidence of atrial fibrillation.