Model of an eight year old subject. Generated using Fast3D and echocardiography. The subject has an interrupted inferior vena cava, a common atrium, a single ventricle, a single atrioventricular valve, L-malposed great arteries, and pulmonary stenosis. Panel A shows a graphical rendering of the finished model with a cut to demonstrate intra-cardiac anatomy. Panel B shows a photograph of the model fabricated with a MakerBot Replicator 2X.