Professor Gilles Dreyfus obtained his medical degree at the University of Paris in 1978. He worked for nearly 10 years with Professor Alain CARPENTIER, along with him he developed a Heart transplantation and LVAD program as well as mitral valve repair expertise. He became Professor of Cardiovascular Surgery in 1989 in Paris University. He moved from Broussais Hospital to Foch Hospital, where he became Chief in 1995. Then he moved to London at The Royal Brompton Hospital and Harefield NHS Trust in London and became as well Professor of Cardio-Thoracic Surgery at Imperial College London School of Medicine, NHLI (with a Chair). Professor Vincent DOR asked him to take over in 2010 at Monaco. Since November 2018 , Professor of Cardiac Surgery at Institut Mutualiste Montsouris , Paris , France ; he performs mostly mitral valve repairs and HOCM surgery. He also teaches since 18 years valve repair surgery, in a course named Master of Valve Repair regularly held in London and then in Monaco.