From October 1983 to 1987, he was the Chef de Clinique for Professor Alain Carpentier, senior resident and staff surgeon at the Broussais Hospital.
He also improved the heart transplant program, from 10 to 25 cases per year, so that the Foch Hospital became the 2nd-3rd most active center in the region of Île-de-France.
Gilles Dreyfus continued the research on artificial hearts as a bridge to transplant, implanting TCI and NOVACOR for the first time in France.
[3] In 2000, French actor Gérard Depardieu underwent coronary artery bypass surgery performed by Professor Dreyfus.
[4] In April 2001, Gilles Dreyfus joined Professor Sir Magdi Yacoub at the Harefield Hospital in London, UK.
They worked together for 6 months before Professor Dreyfus became director of the cardio-thoracic surgery in October 2001, following Sir Yacoub’s retirement.
[5] Results of this method, called Cardiomend were presented at the American Society of Thoracic Surgeons annual meeting in 2001[6] and were the object of two articles.