Heart Surgery: Minimally Invasive Mitral Valve Repair. Offers patients 98% survival and lower risk of stroke compared with valve replacement. Watch this live, February 4th at 5:30pm EST (22:30 UTC) from the University of Maryland Medical Center. This procedure reduces the amount of blood loss, eliminates the need for a breastbone incision, minimizes the chance of infection and allows patients to resume normal activities sooner.