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Stroke, Vol 18, 882-886, Copyright © 1987 by American Heart Association

ARTICLES

Contralateral flow reduction in unilateral stroke: evidence for transhemispheric diaschisis

HL Lagreze, RL Levine, KL Pedula, RJ Nickles, JS Sunderland and BR Rowe

Using clinical presentation, angiography, computed tomography, and nuclear magnetic resonance imaging, 7 patients were identified who had strictly unilateral hemispheric infarction and unilateral cerebrovascular disease. In 6, cerebral blood flow measured by fluorine- 18-fluoromethane inhalation and positron emission tomography was reduced in the contralateral hemisphere (p less than 0.05). Multiple regression analysis demonstrated a high correlation between contralateral flow reduction and the degree of flow impairment in the infarcted area (r = 0.941, p = 0.0014) but not with age, risk factor profile, blood pressure, PCO2, hematocrit, or duration of stroke. We conclude that transhemispheric diaschisis best explains the contralateral flow reduction seen in supratentorial ischemic stroke.

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