Causes of clinical deterioration
| Patients (%) | Clinical worsening | Clinical worsening after initial improvement | Total |
| Intracranial haemorrhage | 6 (33.3) | 0 (0) | 6 (20.6) |
| Cerebral oedema | 6 (33.3) | 0 (0) | 6 (20.6) |
| Persistent arterial occlusion/new stroke | 6 (33.3) | 8 (72.7) | 14 (48.2) |
| Systemic cause | 0 (0) | 1 (9) | 1 (3.4) |
| Unknown cause | 0 (0) | 2 (18.1) | 2 (6.8) |
| Total | 100 | 100 | 100 |