Passive Cooling Versus Blanket-Roll III on The Myocardial Function of Asphyxiated Neonates

Inclusion Criteria: * Evidence of perinatal/intrapartum hypoxia, as indicated by at least one of: * Apgar score of less than or equal to 5 at 10 minutes * Needing mechanical ventilation or ongoing resuscitation at 10 minutes * PH in cord blood gas is less than 7.00 or a base excess worse than or equal to minus 12 mmol /L on cord/arterial/venous/capillary blood gas obtained within 60 minutes of birth. * Evidence of moderate or severe encephalopathy. * Greater than or equal to 35 weeks gestational age. * Birth weight greater than or equal to 1800 g. * Able to begin cooling before 6 hours of birth. Exclusion Criteria: * Congenital cyanotic heart disease. * Multiple congenital anomalies. * Birth asphyxia's babies after start of cooling with cardiovascular instability.