Qureshi grading scheme for stratification of patients with acute ischemic stroke based on initial site of occlusion and collateral supply
| Grade | Qureshi Grading Scheme |
|---|---|
| 0 | No occlusion |
| 1 | MCA occlusion (M3 segment), ACA occlusion (A2 or distal segments), 1 BA/VA branch occlusion |
| 2 | MCA occlusion (M2 segment), ACA occlusion (A1 or A2 segments), ≥2 BA/VA branch occlusions |
| 3 | MCA occlusion (M1 segment) |
| 3A | Lenticulostriate arteries spared and/or leptomeningeal collaterals visualized |
| 3B | No sparing of lenticulostriate arteries or leptomeningeal collaterals visualized |
| 4 | ICA occlusion (collaterals present), BA occlusion (partial filling direct or via collaterals) |
| 4A | Collaterals fill MCA, anterograde fillinga |
| 4B | Collaterals fill ACA, retrograde fillinga |
| 5 | ICA occlusion (no collaterals), BA occlusion (complete) |
Note:—The interobserver variability and correlation with recanalization and short-term favorable outcome and mortality have been previously described in patients with acute ischemic stroke undergoing intra-arterial thrombolysis.22,23
a The predominant pattern of filling.