Arrhythmias in Children Having a Single Left Superior Vena Cava and Minimal Structural Heart Disease

Background: The presence of a single left superior vena cava in the absence of complex congenital heart disease is uncommon, and, in the absence of hemodynamic consequences, it would not be expected to result in cardiovascular signs or symptoms. Single case reports and our anecdotal experience suggested to us that this anomaly is highly associated with cardiac arrhythmias. Objective: We sought to describe the clinically important arrhythmias in a population of young patients having this anomaly. Methods: A retrospective chart review was performed from all patients