Reentrant Supraventricular Tachycardias (SVT) Including Wolff-Parkinson-White Syndrome (Paroxysmal Supraventricular Tachycardia; WPW) By L Brent Mitchell, MD, Libin Cardiovascular Institute of Alberta, University of Calgary Reviewed / Revised Jan 2023 View Patient Education Pathophysiology Symptoms and Signs Diagnosis Treatment Key Points Topic Resources Classic Wolff-Parkinson-White... Narrow QRS tachycardia: Orthodrom... Overview of Atrioventricular... Overview of Wolff-Parkinson-White... Reentrant supraventricular tachycardias (SVT) involve reentrant pathways with a component above the bifurcation of the His bundle.