3D Printed Hearts have been used by surgeons since long as the perfect virtual guide to surgeries. Since the Jump Trading Center of OSF Saint Francis Medical Center opened back in 2013, there have been alot of advancement, and now they have whole library with more than 40 3D printed hearts.
Source: http://www.centralillinoisproud.com/news/local-news/growing-3d-heart-library-at-jump-trading