Professor K. M. John Chan is Consultant Cardiothoracic Surgeon at the Sarawak Heart Centre in Kuching, Gleneagles Intan Medical Centre in Kuala Lumpur and Gleneagles Medini Medical Centre in Johor, Malaysia. He is also Hunterian Professor at the Royal College of Surgeons of England in London, U.K., and Honorary Senior Clinical Research Fellow at the National Heart and Lung Institute at Imperial College London, U.K.He has a large clinical practice in the full range of adult cardiac and thoracic surgery, including coronary artery bypass graft (CABG) surgery, aortic, aortic valve, mitral and tricuspid valve surgery, mediastinal surgery, lung surgery, pleural surgery and video assisted thoracoscopic (VATS) surgery. He has a special interest in mitral and tricuspid valve repair surgery and received advanced training in mitral and tricuspid valve repair techniques from Professor Gilles Dreyfus at Harefield Hospital, U.K., and the Cardiothoracic Centre of Monaco, and Mr Prakash Punjabi at the Hammersmith Hospital in London, amongst others.He has lectured and published extensively on Functional Mitral and Tricuspid Regurgitation, including delivering a Hunterian Lecture on the subject for the Royal College of Surgeons of England, and obtaining a PhD on this from Imperial College London, U.K.