← Critical-care EEG
Sporadic epileptiform discharge prevalence
Combined prevalence of spikes, polyspikes, and sharp waves.
Criteria & assessment
- Abundant: >=1/10 s, but not periodic.
- Frequent: >=1/min and <1/10 s.
- Occasional: >=1/h and <1/min.
- Rare: <1/h.
- When abundant, mean and maximum count per 10-s epoch may be recorded.
Source · 2021ACNS critical-care EEG terminology · PDF p. 8 ↗
Generation & measurement notes
- S01 provides no explicit absent category; represent zero events separately pending review.
Editorial draft · clinical review pending