Torsades de Pointes Ventricular Tachycardia 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 QT Interval Correction (EKG) Torsades de pointes ventricular... Overview of Long QT Syndrome Torsades de pointes ventricular tachycardia is a specific form of polymorphic ventricular tachycardia in patients with a long QT interval.