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Cassette electroencephalography in the evaluation of neonatal seizures
Insights
Prolonged cassette electroencephalographic (EEG) monitoring aids in diagnosing neonatal seizures when routine EEGs are inconclusive. This extended EEG recording is most beneficial for infants with persistent clinical symptoms suggestive of seizures.
Area of Science:
- Neonatal neurology
- Clinical neurophysiology
Background:
- Neonatal seizures often present with subtle or ambiguous clinical signs.
- Routine electroencephalographic (EEG) monitoring may fail to capture intermittent seizure activity.
Purpose of the Study:
- To evaluate the diagnostic yield of 24-hour cassette electroencephalographic (EEG) monitoring in neonates with suspected seizures.
- To determine the utility of prolonged EEG in differentiating clinical events from true seizures.
Main Methods:
- Thirty-seven neonates with clinically suspected seizures underwent three-channel cassette EEG recording for up to 24 hours.
- Patients were categorized based on the presence or absence of recent clinical events and suspicion of seizures.
Main Results:
- Seizure activity on EEG was detected in 7 out of 37 neonates.
- Detection was higher in neonates with recent clinical seizures (5/7) compared to those without recent clinical events (1/18).
- Prolonged EEG was particularly useful for neonates with persistent clinical episodes.
Conclusions:
- Twenty-four-hour cassette EEG recording significantly enhances the detection and differentiation of neonatal seizures.
- This diagnostic tool is most valuable in neonates with persistent clinical symptoms suggestive of seizures, offering a low yield in other cases.
Abstract:
Three-channel cassette electroencephalographic (EEG) recording for up to 24 hours was obtained from 37 neonates with clinically diagnosed or suspected seizures but no seizure activity on routine EEG. EEG seizures were recorded in seven patients, five of whom had experienced clinical seizures in the 24 hours prior to cassette EEG recording. EEG seizures were detected in only one of nine neonates with recurring clinical episodes believed unlikely to be seizures and in only one of 18 without recent clinical events. Cassette EEG can enhance the detection and differentiation of seizures in neonates with persistent clinical episodes but is of low yield otherwise.