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Nonconvulsive status epilepticus during childhood: clinical and electroencephalographic features
Yüksel Yilmaz1, Oğuzhan Onultan, Mustafa Berber
1Division of Child Neurology, Department of Pediatrics, Marmara University Faculty of Medicine, Istanbul, Turkey.
Insights
Nonconvulsive status epilepticus (NCSE) is a medical emergency in children presenting with confusion. Prompt EEG diagnosis and treatment are crucial for recovery, even without a prior epilepsy diagnosis.
Area of Science:
- Pediatric Neurology
- Clinical Neurophysiology
Background:
- Nonconvulsive status epilepticus (NCSE) is a critical condition often diagnosed using EEG in pediatric critical care.
- NCSE can manifest as acute confusional states without obvious motor seizures.
Purpose of the Study:
- To evaluate clinical features and diagnostic utility of EEG in pediatric NCSE.
- To emphasize the importance of considering NCSE in unexplained acute encephalopathy in children.
Main Methods:
- Retrospective analysis of eight pediatric patients diagnosed with NCSE.
- Clinical evaluation and EEG monitoring during acute confusional states.
Main Results:
- Patients presented with acute confusional states without motor seizures.
- EEG confirmed continuous electrographic seizure activity lasting over 30 minutes.
- Intravenous antiepileptic medication led to clinical and EEG recovery.
Conclusions:
- NCSE should be suspected in children with acute unexplained encephalopathy, regardless of epilepsy history.
- Routine emergent EEG is vital for diagnosing and treating pediatric NCSE.
Abstract:
Nonconvulsive status epilepticus (NCSE) is a medical emergency, which is diagnosed most frequently with the routine use of EEG in the pediatric emergency and intensive care units. Data from eight patients, ranging from 2.8-15 years old (median 8.7 years), treated with the diagnosis of NCSE were evaluated on clinical basis. The patients attended the hospital with acute confusional state ranging from sudden onset of verbal cooperation insufficiency to aimless-meaningless behavior and confusion without any motor component of seizure. While five of the cases were diagnosed and followed up with epilepsy, the other three had no history of epilepsy. No reason was detected that could cause acute encephalopathy. EEG examinations during acute confusional state showed partial or generalized continuous electrographic seizure activity lasting at least 30 minutes without clinical seizure activity. After administration of intravenous antiepileptic medication, the confusional states of the patients recovered, and the EEG examinations showed normal baseline activity with significantly diminished discharges or complete normal waveform. Nonconvulsive status epilepticus should be considered in all children admitted to the hospital with acute unexplained encephalopathy, whether they have a history of epilepsy or not. Emergent EEG examination should be a routine part of evaluation in these children for the diagnosis and treatment of NCSE.
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