Dr Robert Califf conducts a series of in-depth and personal interviews with his peers in the world of cardiology to find out what makes them tick, how they feel about the future, and what lessons they have learned during their exceptional careers. In Episode 7 of the series, Dr Califf sits down with Dr Valentin Fuster to find out what it was like to grow up under a dictatorship, how he went from budding tennis pro in Barcelona to top cardiologist at Mount Sinai, and why, if he had to do it all over again, he would still do his training at the Mayo Clinic.