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Recanalization rates at 8 and 24 hours after stroke correlated with sites of occlusion(middle cerebral artery branch,73%and 73%;trunk,27%and 38%, respectively;intracranial internal carotid artery bifurcation,14%and 14%; P=.002),collaterals(good,43%and 51%respectively;scarce,17%and 19%, respectively;P=.01),and Scandinavian Stroke Scale score at admission(P=. 002).Six of 7 patients with delayed recanalization had good outcomes, Recanalization at<8 hours after symptom onset had no independent predictive value for good outcome(P=.69).Recanalization at 24 hours increased the proportion of good outcomes from 23%to 75%in a subgroup of patients.Recanalization did not independently affect mortality(P>.15).Even if delayed,arterial recanalization may improve clinical outcome in a subgroup of patients with middle cerebral artery occlusion. |
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