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Stroke, Vol 23, 194-198, Copyright © 1992 by American Heart Association

ARTICLES

Markers of a hypercoagulable state following acute ischemic stroke

K Takano, T Yamaguchi and K Uchida
Department of Medicine, National Cardiovascular Center, Osaka, Japan.

BACKGROUND AND PURPOSE: The nature of hematologic disorders in different stroke subtypes remains uncertain. The purpose of this study was to clarify the differences in the coagulation and fibrinolytic activities among ischemic stroke subtypes. METHODS: We performed sequential measurements of hematologic parameters in 21 patients with acute cardioembolic stroke, 10 patients with atherothrombotic stroke, 23 patients with lacunar stroke, and 20 age-matched controls. RESULTS: A marked elevation of plasma concentrations of the thrombin- antithrombin III complex and crosslinked D-dimer was observed only in cardioembolic stroke within 48 hours of onset (p less than 0.01), persisting for one month with a gradual decline. In atherothrombotic stroke, however, the level of crosslinked D-dimer was not elevated at the onset, but increased seven days after onset (p less than 0.01). No significant changes in these marker levels were observed in lacunar stroke. CONCLUSIONS: Our findings suggest that the nature of altered coagulation and fibrinolysis are different in various subtypes of ischemic stroke, and that an assessment of these hematologic parameters may be useful for the early classification of these subtypes.

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