TABLE 2.
Qureshi Grading Scheme for Stratification of Patients with Acute Ischemic Stroke Based on Initial Site of Occlusion and Collateral Supply
| Grade | Comment | ||
|---|---|---|---|
| 0 | No occlusion | ||
| 1 | MCA occlusion (M3 segment) | ACA occlusion (A2 or distal segments) | One BA/VA branch occlusion |
| 2 | MCA occlusion (M2 segment) | ACA occlusion (A1 and A2 segments) | Two or more BA/VA branch occlusions |
| 3 | MCA occlusion (M1 segment) | ||
| 3A | Lenticulostriate arteries spared and/or leptomeningeal collaterals visualized | ||
| 3B | No sparing of lenticulostriate arteries nor leptomeningeal collaterals visualized | ||
| 4 | ICA occlusion (collaterals present) | BA occlusion (partial filling directly or via collaterals) | |
| 4A | Collaterals fill the MCA | predominant Anterograde filling | |
| 4B | Collaterals fill the ACA | predominant Retrograde filling | |
| 5 | ICA occlusion (no collaterals) | BA occlusion (no collaterals) | |
ACA-anterior cerebral artery; BA-basilar artery; VA-vertebral artery. The interobserver variability and correlation with recanalization and short-term favorable outcome and mortality have been described in patients with acute ischemic stroke undergoing intra-arterial thrombolysis previously.