Predictive Value of Amplitude-integrated Electroencephalography Pattern and Voltage in Asphyxiated Term Infants

The aim of this study was to correlate amplitude-integrated electroencephalography soon after birth with neurodevelopmental outcome in children who suffered from hypoxic-ischemic encephalopathy. Near term infants with hypoxic-ischemic encephalopathy and amplitude-integrated electroencephalography recording before 6 hours of age were included. Neurologic and cognitive outcome were assessed at 30 months of age and over. Outcome was correlated with either the pattern or voltage of the tracing. Thirty-nine infants were included. Eight died in the immediate neonatal period. At the age of 3 and 6 hours, sensitivity of low voltage to poor outcome was 33% and 42% respectively and of burst suppression pattern to poor outcome was 83% and 75% respectively. Association of voltage to outcome was significant only at 6 hours of age (P = 0.025). Association of pattern to outcome was significant both at 3 and 6 hours of age (P = 0.003, 0.008). These data on amplitude-integrated electroencephalography predictive value early in life were similar to previous studies. Burst suppression pattern, as early as 3 hours of age, is associated with poor outcome. At the age of 6 hours, both low voltage and burst suppression are associated with poor outcome. Pattern seems more sensitive than voltage.