Angiographic collateral pathway and values of oxygen extraction fraction (%) in the hemisphere with symptomatic ICA occlusion
| Collateral circulation | Yes | No |
|---|---|---|
| Values are mean (SD). ACoA, anterior communicating artery; PCoA, posterior communicating artery. p<0.05 versus corresponding value in the “No” group (Student’s t test). | ||
| ACoA | 49.9 (8.7) | 52.0 (6.0) |
| PCoA | 51.4 (6.6) | 50.8 (7.9) |
| ACoA or PCoA | 50.4 (7.7) | 53.1 (5.8) |
| Ophthalmic | 52.5 (9.2) | 50.5 (6.0) |
| Leptomeningeal | 51.6 (6.9) | 50.8 (7.7) |
| Ophthalmic or leptomeningeal | 53.2 (7.6)* | 47.3 (5.0) |