Table 4:
Subarachnoid hemorrhage pattern and final diagnosisa
| Pattern of SAH |
|||||
|---|---|---|---|---|---|
| No SAHb | Perimesencephalic | Sulcal | Diffuse | IVH | |
| No source identified | 0 | 68 (96%) | 24 (65%) | 79 (85%) | 13 (100%) |
| Aneurysm/pseudoaneurysm | 0 | 2 (3%) | 0 | 16 (17%) | 0 |
| AVF | 0 | 0 | 1 (3%) | 0 | 0 |
| AVM | 0 | 0 | 1 (3%) | 0 | 0 |
| Vasculitis | 0 | 1 (1.5%) | 12 (32%) | 0 | 0 |
| Cavernous malformation | 1 (3%) | 0 | 0 | 0 | 0 |
a
Percentages reflect patient percentage with a vascular pathology within each SAH pattern.
b
“No SAH” refers to patients with xanthochromia or isolated IVH.