• Arch Neurol Chicago · Jul 2005

    Initial Glasgow Coma Scale score predicts outcome following thrombolysis for posterior circulation stroke.

    • Jack W Tsao, J Claude Hemphill, S Claiborne Johnston, Wade S Smith, and David C Bonovich.
    • Department of Neurology, San Francisco General Hospital, San Francisco, Calif, USA. jtsao@usuhs.mil
    • Arch Neurol Chicago. 2005 Jul 1;62(7):1126-9.

    BackgroundRandomized trials of thrombolytic stroke treatment have either excluded patients with posterior circulation ischemia or used inclusion criteria making enrollment of these patients less likely. Consequently, there is less published information on thrombolytic therapy for posterior circulation stroke.ObjectiveTo determine effective thrombolytic treatment times for posterior circulation stroke and factors that might help predict clinical outcome.DesignWe describe our experience treating 21 consecutive patients with either intravenous or intra-arterial thrombolytic therapy for posterior circulation ischemic stroke between October 9, 1993, and February 19, 2001.Main Outcome MeasuresNational Institutes of Health Stroke Scale, Glasgow Coma Scale, and modified Rankin Scale scores were evaluated at baseline, and the modified Rankin Scale was measured 3 months after stroke, with a good outcome being a modified Rankin Scale score of 2 or less.ResultsNine patients received intravenous therapy; 12 patients received intra-arterial therapy. The median National Institutes of Health Stroke Scale score at onset was 20 (range, 2-39), and the median Glasgow Coma Scale score was 9 (range, 3-15). Twelve patients were treated within 8 hours of symptom onset (range, 1 1/2 hours to 16 days). Nine patients (43%) had a modified Rankin Scale score of 2 or less at 3 months. The initial Glasgow Coma Scale score and treatment within 8 hours of symptom onset were each associated with good outcome, but the initial National Institutes of Health Stroke Scale score was not predictive.ConclusionsThrombolytic therapy for posterior circulation stroke may be beneficial even when initiated 8 hours after symptom onset. Level of consciousness, as measured by Glasgow Coma Scale score, seems to be a more important predictor of outcome than the initial National Institutes of Health Stroke Scale score.

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