A small clinical trial suggests the technology can help physicians perform life-saving surgeries more efficiently and safely Researchers stimulated digital replicas of the patients' hearts with electrical signals to locate the sources of their irregular heartbeats. Johns Hopkins University via Youtube Creating virtual replicas of patients’ problematic organs could be the future of medicine. In a small clinical trial, testing surgical procedures on “digital twins” of patients’ hearts before operation led to better outcomes than traditional methods. The findings, published April 1 in the  New England Journal of Medicine , suggest that the personalized technology could usher in a new way to treat a life-threatening heart rhythm condition. “We show the technology isn’t merely feasible, it has excellent outcomes,” says  Natalia Trayanova , a study co-author and a biomedical engineer at Johns Hopkins University, in a  statement .…