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Journal of the Korean Child Neurology Society 2011;19(1):33-39.
Published online April 30, 2011.
Relationship between Initial EEG and the Prognosis of Acute Encephalitis.
Jae Min Oh, Seom Gim Kong, Yun Jin Lee, Sang Ook Nam
1Department of Pediatrics, Busan St. Mary's medical center, Korea.
2Department of Pediatrics, Pusan National University, School of Medicine, Korea. wearehan@yahoo.co.kr
This study aimed to identify the usefulness of initial electroencephalograms (EEG) in the prediction of neurological outcomes of acute encephalitis. METHODS: Thirty-one patients diagnosed with acute encephalitis between January 2007 and March 2010 were included in the study, all of whom were less than 18 years old. Patients were divided into two groups. Those who had recovered completely were designated group A, and those who had neurological sequalae were designated group B. We compared the severity of EEG background abnormalities according to the Synek classification, and the incidence of interictal epileptiform discharges, electrographic seizures, normal sleep features, and EEG reactivity to pain stimuli between the two groups upon initial EEGs. RESULTS: Compared with group A, group B showed a higher grade of EEG background abnormalities (P = 0.004). The incidence of interictal epileptiform discharge (P = 0.004) and electrographic seizure (P = 0.049) were also higher in group B. Further, Group A had more EEG reactivity (P = 0.002) and the incidence of normal sleep features tended to be higher in group A (P = 0.081). CONCLUSION: Initial EEG features including the severity of EEG background abnormalities are helpful in predicting the prognosis of acute encephalitis.
Key Words: Encephalitis, Prognosis, Electroencephalography


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