Results
| Origin of the Collaterals | Hemispheres (n = 80) |
|---|---|
| Collaterals from posterior callosal artery (type I) | 16 (20%) |
| Collaterals from posterior choroidal arteries (type II) | 16 (20%) |
| Pio-pial connections (type III) | 12 (15%) |
| Competence | |
| Type I | 7 (8.7%) |
| Type II | 12 (15%) |
| Type III | 9 (11.3%) |
| Type IV | 5 (6.3%) |
| Correlation between Suzuki score and posterior collaterals | |
| 0 | 1 (1.3%) |
| I | 1 (1.3%) |
| II | 4 (5%) |
| III | 4 (5%) |
| IV | 8 (10%) |
| V | 4 (5%) |
| VI | 8 (10%) |
| Cervical occlusion of the ICA | 1 (1.3%) |