Pediatric Cardiology is that branch of medicine concerned with the study of congenital cardiac malformations, acquired Pediatric heart diseases and abnormalities of the systemic and pulmonary circulations in the fetus, new born, child and young adult. Some popular Pediatric Cardiac Diseases are Cardiac Dysrhythmia i.e. an irregular heartbeat, which is either too fast as Bradycardia like or too slow as Tachycardia. If blood flow is not proper to the heart muscle then it is call Angina. Hypoplastic left heart syndrome is a complex and rare heart defect present at birth (congenital).