Table 2.
Diagnostic EEG criteria for nonconvulsive status epilepticus,21 and nonconvulsive phase at the end in a semiologic sequence of one SE episode
| Diagnostic investigation | N |
|---|---|
| Diagnostic criteria for nonconvulsive SE in EEG:21 | 102 |
| Epileptiform discharges >25 per 10 s epoch | 10 |
| Spatiotemporal evolution | 34 |
| Epileptic discharges <25 per 10 s | 17 |
| Rhythmic activity | 13 |
| Epileptic discharges <25 per 10 s AND rhythmic activity | 4 |
| Subtle clinical phenomena | 26 |
| Epileptic discharges <25 per 10 s | 13 |
| Rhythmic activity | 3 |
| Epileptic discharges <25 per 10 s AND rhythmic activity | 1 |
| No EEG performed, observation in clinical context | 9 |
| Fluctuation | 55 |
| Epileptic discharges <25 per 10 s | 47 |
| Rhythmic activity | 5 |
| Epileptic discharges <25 per 10 s AND rhythmic activity | 3 |
| Rhythmic activity without fluctuation | 5 |
| Clinical improvement | 12 |
| Positive ictal HMPAO‐SPECT | 1 |
EEG, electroencephalography; HMPAO‐SPECT, hexamethylpropyleneamine oxime–single‐photon emission computed tomography.