Single ventricle hearts have only one ventricle that can pump blood effectively and the treatment requires three stages of operations to reconfigure the heart and circulatory system. At the second stage, Glenn procedure is performed to connect Superior Vena Cava (SVC) to the Pulmonary Arteries (PA). For the third and most complex operation, called Fontan, an extracardiac conduit is used to connect Inferior Vena Cava (IVC) to the PL and there after no deoxygenated blood goes to the heart.