← Critical-care EEG
Electrographic seizure
An EEG event that meets the ACNS electrographic seizure criteria through discharge rate or definite evolution and duration.
Criteria & assessment
- Either discharges averaging >2.5 Hz for >=10 s (>25 discharges/10 s), OR a pattern with definite evolution lasting >=10 s.
- Sharply contoured discharges >200 ms may qualify through the high-rate pathway even when not technically epileptiform.
- Evolution must satisfy the source RPP evolution criteria; amplitude change alone is insufficient.
Source · 2021ACNS critical-care EEG terminology · PDF p. 22 ↗
Electrographic seizure · EEG 24 · PDF p. 25 ↗Editorial draft · clinical review pending