• Cardiothoracic Surgery Services

• Royal College of Physicians & Surgeons of Canada, Thoracic and Cardiac Surgery - General

• English
• Mandarin

University of Toronto

McMaster UniversityCardiac Surgery

Brigham and Women's HospitalTranscatheter Cardiovascular Surgery
Brigham & Womens Hospital

• Associate professor — Department of Surgery, UCI School of Medicine
• Chief — Division of Cardiothoracic Surgery, Department of Surgery, UCI School of Medicine
• Director — UCI Health Minimally Invasive Cardiac Surgery
• Surgical Director — UCI Health Structural Heart Program

• Physicians of Excellence, Orange County Medical Association — 2023

Dr. Jack C.J. Sun is a UCI Health cardiothoracic surgeon who specializes in minimally invasive heart surgery, including coronary artery bypass, heart valve repair, and procedures to treat atrial fibrillation and arrhythmia. His clinical interests also include transcatheter cardiovascular surgery and transcatheter aortic valve replacement (TAVR).

Sun received his medical degree from the University of Toronto in Canada and finished residency training in cardiac surgery at McMaster University, also in Canada. He completed an advanced fellowship in cardiac surgery at the Brigham & Women's Hospital, a Harvard University-affiliated teaching hospital in Boston.

Before joining UCI Health to lead the cardiovascular surgery team, Sun was on the faculty of the Keck School of Medicine at USC and served as the director of cardiothoracic surgery at Torrance Memorial Medical Center. Before joining USC, he was on the faculty at the University of Washington in Seattle.

Sun, who is chief of the UCI School of Medicine’s Division of Cardiothoracic Surgery, see patients in Orange, Irvine and Laguna Hills.