Dr. Castellanos obtained his Medical Degree from the University of Havana’s School of Medicine in 1925. He was a pediatrician, radiologist and cardiologist who was a pioneer in the field of angiocardiography to include the study of the various congenital malformations of the heart. He also was involved in the development of the procedure of pneumomediastinum and in multiple investigations involving hematology and infectious diseases. He was nominated to the Nobel Prize in Medicine and Physiology.