3D printed heart helps to save baby

Not an organ 3D printed from tissue, but a model of the heart that allowed a team of surgeons at the Morgan Stanley Children’s Hospital of New York-Presbyterian to practise before the main event.
The baby’s heart disease was unusually complicated. Both the aorta and pulmonary arteries rose from the right ventricle, and there was a large hole in his heart — and a CT scan was not sufficient to help the doctors figure out a surgical plan, since the baby’s heart was about the size of a walnut.