After being born with a serious heart defect called a pulmonary atresia with an intact septum, Nicholas received corrective surgery as an infant. But at 25 he discovered the the right side of his heart was enlarged and would need to be operated on. Surgeons used a new process of combining MRI and 3D echocardiogram data into a single 3D model that has enough detail for doctors to pre-plan complex surgeries. And by showing the 3D model to Nicholas, his doctors were able to provide him with a clearer picture of what was wrong and how they would be fixing it. You can read more about 3D printed hearts over on 3DPrint.com: http://3dprint.com/98416/hold-their-3d-printed-hearts/