The acute vertebrobasilar occlusion associated with the poor prognosis, particularly tandem occlusion. However, few data on the efficacy of the endovascular therapy was indicated in this occlusion. The investigators reported whether the additional rescue extracranial stenting improved clinical outcome by modified Rankin Scale (mRS) score within 3 months after the procedure
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The good 3-month outcome rate
Timeframe: 3 months