Open-heart surgery during the first three months of life.

Body Weight Cardiopulmonary Bypass Heart Arrest, Induced Heart Defects, Congenital/mortality,surgery Heart Septal Defects, Ventricular/mortality,surgery Hematocrit Humans Hypothermia, Induced/methods Infant Infant, Newborn Ischemia Methods Postoperative Complications Pulmonary Veins/abnormalities Seizures/etiology Tetralogy of Fallot/surgery Time Factors Transposition of Great Vessels/surgery