Caffeine induced changes in cerebral circulation.
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چکیده
منابع مشابه
Caffeine induced changes in cerebral circulation.
While the caffeine induced cerebral vasoconstriction is well documented, the effects of oral ingestion of the drug in a dose range comparable to the quantities in which it is usually consumed and the intensity and duration of the associated reduction in cerebral circulation are unknown. Cerebral blood flow was measured via the 133Xenon inhalation technique before and thirty and ninety minutes a...
متن کاملCaffeine Induced Changes in Cerebral Circulation
Caffeine Induced Changes in Cerebral Circulation To the Editor: We reported significant reductions in cerebral blood flow (CBF) 30 minutes and 90 minutes after the oral administration of 250 mg of caffeine in 14 normal volunteers (age 26 yrs, S.D. 6) in the SeptemberOctober 1985 issue of Stroke. As an extension of this study, we evaluated CBF responses to similar doses of caffeine in elderly su...
متن کاملComparison of caffeine-induced changes in cerebral blood flow and middle cerebral artery blood velocity shows that caffeine reduces middle cerebral artery diameter.
Changes in cerebral blood flow (CBF) can be assessed directly with xenon clearance (XeC) or indirectly by measuring changes in middle cerebral artery blood velocity (Vmca) with transcranial Doppler (TCD). The aim of this study was to compare the changes in CBF and Vmca following caffeine ingestion. Nineteen patients (age 48-86, recovering from an acute stroke) and ten controls (age 52-85) were ...
متن کاملRelationship between caffeine-induced changes in resting cerebral perfusion and blood oxygenation level-dependent signal.
BACKGROUND AND PURPOSE Recent interest has emerged in the use of pharmacologic methods to maximize blood oxygenation level-dependent (BOLD) signal intensity changes in functional MR imaging (fMRI). Adenosine antagonists, such as caffeine and theophylline, have been identified as potential agents for this purpose. The present study was designed to determine whether caffeine-induced decreases in ...
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........................................................................................................................166 Autobiographical Statement..........................................................................................168
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ژورنال
عنوان ژورنال: Stroke
سال: 1986
ISSN: 0039-2499,1524-4628
DOI: 10.1161/01.str.17.6.1337