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Pediatric cardiology, as a discipline, arose from early descriptive studies of congenital cardiac defects. The development of the stethoscope allowed some clinical diagnoses to be made during life. Cardiology as a medical specialty was limited, mainly, to internists. When Robert Gross ligated a patent ductus in 1938, pediatric cardiology, as a discipline, was born. Physiologic studies, angiography, and the development of extracorporeal circulation allowed congenital cardiac lesions previously considered a curiosity to be diagnosed and treated successfully. The few pediatricians who were interested in cardiology taught themselves, and soon pediatric cardiology training programs developed. By 1961, pediatric cardiology became the first subspecialty board in pediatrics. The past 60 y has brought enormous progress. Cardiac ultrasound, color-flow Doppler, and magnetic resonance imaging have made diagnostic cardiac catheterization almost unnecessary. Instead, interventional cardiac catheterization rapidly developed and is already able to replace surgery in the treatment of a number of cardiac defects. The first 50 y of cardiology has been focused on patient care, education, and clinical research, but the last 10 y has added exciting, basic research discoveries, which are elucidating the cause of cardiac defects with hope for prevention in the future. As a discipline, pediatric cardiology has always required a team-pathologists, physiologists, cardiologists, surgeons, intensivists, interventionists, and anesthesiologists-all playing an important role in the treatment of children with cardiac problems. Today the geneticists, molecular biologists, and other basic scientists are joining the team to ensure an exciting future for pediatric cardiology and the children yet to be born.

A History of Pediatric Specialties: The Development of Pediatric Cardiology