A 2-week-old baby underwent surgery for a congenital heart defect, thanks to a 3D-printed model, the News-Times reported.

Surgeons created a 3D model of the child’s heart using data from an MRI, which gave them a guide to perform the operation, FoxNews reported.

“The baby’s heart had holes, which are not uncommon with [congenital heart defect], but the heart chambers were also in an unusual formation, rather like a maze,” Dr. Emile Bacha, head of cardiac surgery at Columbia Presbyterian Hospital in New York, who performed the surgery July 21 at Morgan Stanley Children’s Hospital, said.

“In the past, we had to stop the heart and look inside to decide what to do,” Bacha said. “With this technique, it was like we had a road map to guide us. We were able to repair the baby’s heart with one operation.”