Figure 1: An 11-year-old male patient with AVSD, dextrocardia, double outlet right ventricle, bilateral superior vena cava and mixed total anomalous pulmonary venous connection. (a) Virtual model derived from cardiac computed tomography demonstrating the relationship between the unbalanced atrioventricular septal defect (encircled), ventricles, and outflow tracts. (b) Clear rigid 3D-printed model being utilized during multi-disciplinary team meeting to discuss the possible surgical approach. 3D: Three-dimensional, Ao: Aorta, AVSD: Atrioventricular septal defect, IVC: Inferior vena cava, LLPV: Left lower pulmonary vein, LSVC: Left superior vena cava, LV: Left ventricle, MPA: Main pulmonary artery, RCA: Right coronary artery, RPA: Right pulmonary artery, RV: Right ventricle. Reprinted with permission from Vettukattil et al.