Fig. 3From: Efficacy of isoproterenol in the evaluation of dormant conduction and arrhythmogenic foci identification in atrial fibrillation ablationPV firing. An electrocardiogram from a 68-year-old man who was administered with an ISP after a PVI for the treatment of PAF. The LPV was the common branch. Initially, after administration, firing began on both sides and later became persistent in both the PVs. PV: pulmonary vein; ISP: isoproterenol; PVI: pulmonary vein isolation; LPV: left pulmonary veinBack to article page