Using the Baseline CT Scan to Select Acute Stroke Patients for IV-IA Therapy
M.D. Hilla,
A.M. Demchuka,
T.A. Tomsickb,
Y.Y. Paleschc,
J.P. Broderickb on behalf of the IMS-1 Investigators
a From the Calgary Stroke Program, Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada
b the Cincinnati Stroke Program, Department of Neurology and Stroke, University of Cincinnati, Cincinnati, Ohio
c the Department of Biostatistics and Epidemiology, Medical University of South Carolina, Charleston, SC

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Fig 1. A, Baseline CT scan at 100 minutes from stroke onset showing a left middle cerebral artery infarct with an ASPECT score of 8. Points are taken off for hypoattenuation of the head of caudate and the lentiform nuclei. Based upon our data, this patient would be an ideal candidate for IV-IA therapy.
B, Baseline CT scan at 175 minutes from stroke onset showing a well-evolved right middle cerebral artery infarct with an ASPECT score of 0. Based upon our data, this patient could be harmed by IV-IA therapy.
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Fig 2. Modified Rankin Scale outcomes at 90 days stratified by the baseline ASPECT score and adjusted using ordered logistic regression for baseline age, NIH Stroke Scale score, onset-to-treatment time, and baseline serum glucose.
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