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CEREBRAL BLOOD FLOW AND METABOLISM IN MULTI-INFARCT DEMENTIA Takashi Ujike 1 , Akiro Terashi 1 , Toshiyuki Soeda 1 , Shin Kitamura 1 , Toshiaki Kato 1 , Masaaki Iio 2 1Second Department of Internal Medicine, Nippon Medical School 2Department of Radiology, Nakano National Hospital pp.905-912
Published Date 1985/9/1
DOI https://doi.org/10.11477/mf.1406205579

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  • Abstract
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Cerebral blood flow and oxygen metabolism were studied in three aged normal volunteers and 10 patients with multi-infarct dementia (MID) by Positron Emission Tomography using O-15. The diagnosis of MID was done according to the Loeb's modified ischemic score and X-ray CT findings. The MID patients, whose X-ray CT showed localized low density areas in the subcor-tical white matter and basal ganglia and thalamus, were studied. No occulusion was observed at anterior cerebral artery and/or middle cerebral artery on cerebral angiography. All cases of MID were mild dementias. Regional CBF, rOEF and rCMRO2 were measured by the steady state technique described by Terry Jones et al.

The values of rCBF in MID patients were significantly low compared with those of aged normal subjects in frontal, temporal, occipital, parietal cortices and thalamus. The values of CMRO2 in MID were significantly low in frontal, temporal, occipital cortices and thalamus compared with normal subjects'. The OEF was 0.46 in aged normal subjects, and 0.52 in MID patients. The MID patients in the early stage of dementia showed the increased oxygen extraction fraction, and this fact suggests that ischemia is a significant pathogenic mechanism in the production and progression of multi-infarct dementia.

The decrease of CBF and CMRO2 in MID compared from normal subjects' were most remar-kable in frontal cortex. The impairment of mental functions in MID should be caused by the de-creased neuronal activities in frontal association cortex.


Copyright © 1985, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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