Mia Gonzalez did not know what it was like to be a normal child. She had breathing problems and was constantly in the hospital, even just for a common cold. By the time she was four years old, doctors had solved the mystery; it was a rare heart condition that was choking Gonzalez from the inside. Heart surgery on this little girl was necessary, yet risky, but a 3D printer would provide some clarity in a complex situation. Having an accurate model of Gonzalez's heart before the operation allowed the surgeons in Miami to create a plan long before they operated on Mia. It is just another way heart surgery is changing today. From robotic heart surgery in Abu Dhabi, to a transplant system that keeps the heart warm and beating outside the body, technology is changing the way we save hearts around the world.