EEG in neonatal herpes simplex encephalitis.

Area of Science:

• Neonatal Neurology
• Pediatric Infectious Diseases
• Clinical Neurophysiology

Background:

• Herpes simplex encephalitis (HSE) is a severe neurological condition in newborns.
• Accurate and timely diagnosis is crucial for effective management and improved outcomes.
• Electroencephalography (EEG) is a key diagnostic tool in evaluating neonatal neurological disorders.

Purpose of the Study:

• To analyze EEG findings in newborns diagnosed with herpes simplex encephalitis.
• To identify specific EEG patterns associated with HSE in this population.
• To explore the correlation between EEG abnormalities and clinical outcomes.

Main Methods:

• Analysis of electroencephalograms (EEGs) from 21 newborns with confirmed herpes simplex encephalitis.
• Detailed examination of seizure activity, including focal or unilateral electrical seizures.
• Assessment of EEG background abnormalities and their relationship to clinical presentation.

Main Results:

• 76% of neonates with HSE exhibited electrical seizures on EEG, characterized by sharp or slow waves at pseudo-periodic intervals.
• Seizure paroxysms varied in duration, with longer durations observed in some patients.
• A correlation was found between prolonged seizures, abnormal EEG background, and poorer clinical outcomes.

Conclusions:

• The presence of specific EEG seizure paroxysms in newborns with encephalitis warrants consideration of herpes simplex virus as the etiology.
• EEG findings, particularly seizure characteristics and background abnormalities, can provide prognostic information.
• Early EEG analysis aids in the diagnosis and management of neonatal herpes simplex encephalitis.