1. Department of Cardiovascular Surgery, Qinghai Provincial People's Hospital, Xining, Qinghai, China
2. Department of Cardiology, Qinghai Red Cross Hospital, Xining, Qinghai, China
3. Department of Hyperbaric Oxygen, Qinghai Provincial People's Hospital, Xining, Qinghai, China
4. Department of Anesthesiology, Qinghai Provincial People's Hospital, Xining, Qinghai, China