Paradoxical downward seizure pattern on amplitude-integrated electroencephalogram.
M Ito1, H Kidokoro2, Y Sugiyama1
1Division of Neonatology, Center for Maternal-Neonatal Care, Nagoya University Hospital, Nagoya, Japan.
Summary
Amplitude-integrated electroencephalography (aEEG) typically shows seizure patterns as rises. This case highlights that paradoxical downward aEEG patterns can also indicate neonatal seizures, requiring careful interpretation.
Area of Science:
- Neonatal neurology
- Clinical neurophysiology
Background:
- Amplitude-integrated electroencephalography (aEEG) is increasingly used for neonatal brain function assessment and seizure detection.
- Seizure patterns on aEEG are typically characterized as transient rises.
Observation:
- A case of neonatal seizures presented with paradoxical transient drops on aEEG traces.
- Ictal electroencephalography (EEG) revealed initial low-amplitude fast rhythmic activity, progressing to epileptic recruiting rhythms and high-voltage slow waves.
Findings:
- Downward patterns on aEEG traces can represent seizure activity.
- This challenges the conventional understanding of aEEG seizure patterns.
Implications:
- Clinicians should consider downward aEEG trends as potential indicators of neonatal seizures.
- This finding may improve the diagnostic accuracy of aEEG in neonatal intensive care units.
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