Figure 2: A 26-year-old male with large atrial septal defect and pulmonary atresia with intact ventricular septum. (a) Virtual model demonstrating mid-cavitary obstruction of the right ventricle by hypertrophied muscle bundles. (b) Flexible 3D-printed model being used for patient education during postsurgical follow-up visit. 3D: Three-dimensional, Ao: Aorta, PA: Pulmonary artery, RA: Right ventricle, RV: Right ventricle, TV: Tricuspid valve. Reprinted with permission from Vettukattil et al.