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Thalamomesencephalic strokes after cocaine abuse

Department of Neurology, University of California, San Francisco, CA.

Three young patients developed strokes of rostral midbrain and thalamus shortly following cocaine abuse. Two had infarctions and one had a hemorrhage, but none had clear risk factors other than cocaine for this relatively uncommon type of stroke. Toxicologic analysis confirmed isolated cocaine use in each patient. In the two cases of infarction studied angiographically, one had normal findings and the other had focal narrowing of the P1 segments of the posterior cerebral arteries bilaterally. Since the P1 segment has a uniquely sparse perivascular sympathetic supply, we suggest that direct adrenergic-mediated vaso-constriction is not critical to the production of cocaine-associated stroke.

Address correspondence and reprint requests to Dr. Rowley, Department of Neurology, University of California, San Francisco, Box 0114, M-794, San Francisco, CA 94143.

Received February 16, 1988. Accepted for publication in final form September 8, 1988.

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