Does the Mori grading system provide more refined prognostic information than the TIMI grading system for clinical outcome in stroke patients treated with intra-arterial thrombolysis?
The Mori grading system provides more refined prognostic information than the TIMI grading system for stroke patients with partial recanalisation after intra-arterial thrombolysis.
BACKGROUND: Different grading systems of arterial recanalisation have never been compared in large series of stroke patients treated with intra-arterial thrombolysis (IAT). METHODS: Clinical and angiographic findings and outcome were analysed in 147 patients with M1 or M2 segment occlusion of the middle cerebral artery treated with IAT. Associations of the thrombolysis in myocardial infarction (TIMI) grading system and the Mori grading system with clinical outcome were compared. RESULTS: The median NIHSS score on admission was 15 and the mean time from symptom onset to IAT was 242 minutes. After three months the outcome was favourable (defined as modified Rankin scale score (mRS) 50% (Mori 3) than in those with reperfusion <50% (Mori 2) (p = 0.008). CONCLUSIONS: Both TIMI and Mori grading systems are useful for predicting outcome after stroke and IAT. When recanalisation is partial the Mori classification is more refined in giving prognostic information.
Marcel Arnold (Fri,) studied this question.