Nestor Fernando Sandoval Reyes Pontificia Universidad Javeriana Physisician, 1979 Pontificia Universidad Javeriana General Surgeon, 1985 Fundación Shaio Cardiovascular Surgeon ,1987 University of Alabama al Birmingham Pediatric Cardiovascular Surgeon, Cardiac Surgeon, 1990 Physician from the Pontificia Universidad Javeriana, specialist in general surgery and cardiovascular surgery, and fellow in pediatric cardiovascular surgery at Alabama University, Birmingham, USA. Currently, he is a cardiovascular surgeon and director of the Institute of Congenital Heart Disease of the Fundación Cardioinfantil hospital. He has considerable experience in the clinical aspects of vascular grafts' implantation and its probable outcomes was key to classifying the causes of vascular grafts' failure, as well as to understand the clinical protocols behind each kind of failure. Member of the Society of Thoracic Surgeons of the World Society for Pediatric and Congenital Heart Surgery. Member of the Latin Society of Pediatric Cardiology and Pediatric Cardiovascular surgery Member of the Colombian Society of Cardiology and Cardiovscular surgery Member of the editorial committee of the “World Journal of the World Society for Pediatric and Congenital Heart Surgery Member of the Society for Pediatric and Congenital Heart Surgery