Hypoplastic left heart syndrome is a heart defect that is present
at birth (congenital) in which the left side of the heart and aorta are very
small or underdeveloped. The small left ventricle makes the right ventricle responsible for pumping blood to the
lungs and body.
Over time, too little blood may be pumped to the body, leading to
heart failure. Without a series of major heart operations, this defect almost always
John Pope, MD - Pediatrics & Larry A. Latson, MD - Pediatric Cardiology