Table 1 Clinical summary of quantitative EEG in subarachnoid hemorrhage
| First author [ref] | N | SAH Grade | Clinical Criteria | Outcome | qEEG Results |
|---|---|---|---|---|---|
| Labar [7] | 11 | HH I: 2 | 1) Focal neurological deficit | Ischemic events (n = 18) | 5 silent infarcts detected by qEEG alone |
| HH III: 8 | 2) Global cortical dysfunction | 4 qEEG changes prior to clinical changes | |||
| HH IV: 1 | 3) Encephalopathy | ||||
| Vespa [8] | 32 |
Awake (HH I-III) | 1) Angiographic vasospasm | Vasospasm (n = 19) | All vasospasm with qEEG changes. |
| 2) TCD vasospasm (> 120 cm/s or Lindegaard ratio > 3) | 10/19 qEEG changed mean 2.9 days prior to vasospasm confirmation. | ||||
| Claassen [9] | 34 |
Comatose (HH IV-V) | DCI | DCI (n = 9) | Raw EEG changed in 78%; qEEG sensitive to a 10% change in 6 post-stimulation minutes or 50% change in only 1 post-stimulation minute. |
| 1) Clinical deterioration | |||||
| 2) New infarct on CT | |||||
| Rathakrishnan [10] | 12 | mF 3-4 | DCI | DCI (n = 8) | qEEG sensitivity with clinical data is 67%. |
| HH I: 1 | 1) Clinical deterioration | 3/8 qEEG changed more than 24 hours prior to clinical change. | |||
| HH II: 5 | 2) New infarct on CT | ||||
| HH III: 2 | |||||
| HH IV: 3 | |||||
| HH V: 1 |
