Focal Ablation versus Single Vein Isolation for Atrial Tachycardia Originating from a Pulmonary Vein. - BARANOWSKI, BRYAN; WAZNI, OUSSAMA; LINDSAY, BRUCE; KANJ, MOHAMMED; SALIBA, WALID; BURKHARDT, DAVID; THOMAS, GEORGE; RICKARD, JOHN; TCHOU, PATRICK (Pacing & Clinical Electrophysiology, 2010)