Two world-famous cardiac surgeons, Dr. Stuart Jamieson and Dr. Jolene Kriett, performed the seven-hour procedure, which was a true community effort. A surgery team from UCSD Medical Center volunteered their time, and more than 100 people, including surgeons, anesthesiologists, radiologists, respiratory therapists, nurses, laboratory specialists, and the Zoo veterinarians, veterinary technicians, and keepers came together at the Zoo hospital to help take care of Karen the orangutan.