Persistent Left Superior Vena Cava in a Heart Transplant Recipient's Native Heart: A Rare Case Diagnosed by Transesophageal Echocardiogram.

Persistent left superior vena cava (PLSVC) is a rare abnormality with incidence reported as 0.3% to 0.5% in the general population and about 10 times higher in patients with congenital heart disease.