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Stroke, Vol 19, 1426-1430, Copyright © 1988 by American Heart Association

ARTICLES

Regional cerebral blood flow during an attack of vertebrobasilar insufficiency

F Sakai, K Ishii, H Igarashi, S Suzuki, N Kitai, T Kanda and Y Tazaki
Department of Medicine, School of Medicine, Kitasato University, Japan.

Using technetium-99m-labeled hexamethylpropyleneamineoxime [( 99mTc]HM- PAO) and single-photon emission computed tomography, we measured changes in regional cerebral blood flow in a 58-year-old man during an attack of vertebrobasilar insufficiency. Angiography demonstrated compression of the left vertebral artery by the osteophytes of cervical spondylosis when the patient turned his head to the left. Measured in the orthostatic position while turning his head to the left during a typical attack of vertebrobasilar insufficiency, regional cerebral blood flow was significantly reduced in the left cerebellum and the right occipital region. Our study illustrates the capability of [99mTc]HM-PAO single-photon emission computed tomography to measure transient reductions in regional cerebral blood flow and to relate these changes to the pathophysiology of vertebrobasilar insufficiency.

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