Pediatric Cardiology is a branch of pediatrics which deals with heart and heart related disorders of children. Heart is the first organ formed from the cells of the Inner Cell Mass (ICM) or epiblast of the blastocyst in early embryogenesis. Pediatriccardiology includes medical diagnosis and treatment of congenital heart defects, coronary artery diseases, heart failures, valvular heart diseases and electrophysiology in children. A medical practitioner who specializes in this field of pediatric cardiology is called pediatric cardiologist.