Hospitals printing 3-D hearts to help in surgeries
(Chicago Tribune Business News)

The night before operating on 2-year-old Myla Kramer, her surgeon held a copy of her heart, produced on a 3-D printer, in his hands. Dr. Mark Plunkett studied it, trying to determine how to patch the many Swiss-cheeselike holes in the bottom of her heart - a potentially life-threatening condition....