Regional cerebral blood flow in apoplexy measured by 133Xe clearance method

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  • Regional Cerebral Blood Flow in Apoplexy Measured by <sup>133</sup>Xe Clearance Method

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Regional cerebral blood flow was simultaneously measured in six regions of 4 normal subjects and 13 patients with apoplexy in subacute and chronic stages by 133Xe clearance method. The average values of mean cerebral blood flow of the six regions, the flow of fast and slow components and the relative weight ratio of the fast component in normal subjects were 46.9ml/100g/min, 73.7ml/100g/min, 22.1ml/100g/min and 49%, respectively. The patients were divided into two groups: one group of 9 patients without cerebral arterial occlusion on the carotid angiogram and the other group of 4 patients with the middle cerebral artery occlusion. In both groups, the cerebral blood flow was decreased, especially in the group with the middle cerebral artery occlusion. Abnormal foci, where interregional differences exceeded 14%, were observed in 6 out of 9 patients without arterial occlusion and in 3 out of 4 patients with the middle cerebral artery occlusion. In the former, such abnormal foci did not coincide in all cases except one with the diseased regions which were assumed from neurological findings. However, in the latter, ischemic regions were almost restricted to the territory of the middle cerebral artery.

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