Abstract: @@ It has been demonstrated that pulmonary veins (PV)play an important role in the initiation and perpetuation of paroxysmal atrial fibrillation (PAF).1-5 Therefore, PV isolation has become the cornerstone for catheter ablation in the majority of these AF patients.3-5 In addition, ectopic foci in the non-PVs areas, such as superior vena cava(SVC), inferior vena cava (IVC), coronary sinus (CS),ligament of Marshall, have also participated in the initiation of PAF.The ostium isolation or local ablation for these structures was feasible and safe for PAF therapy.6-9 In this report, we describe a young PAF patient with anomalous right superior PV (RSPV) inserting into the SVC-right atrium (RA) junction who underwent successful isolation of all PVs and SVC for PAF guided with the CARTO-Merge technique.