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  • Title: Coagulation-fibrinolysis system in poststroke patients receiving antiplatelet medication.
    Author: Tohgi H, Takahashi H, Chiba K, Tamura K.
    Journal: Stroke; 1993 Jun; 24(6):801-4. PubMed ID: 8506551.
    Abstract:
    BACKGROUND AND PURPOSE: We studied the activities of the coagulation-fibrinolysis system in the chronic stage of poststroke patients and the effect of antiplatelet medication on the system. METHODS: We determined fibrinogen, antithrombin III, thrombin-antithrombin III complex, tissue plasminogen activator antigen, plasminogen activator inhibitor-1, plasmin-alpha 2 plasmin inhibitor complex, and D-dimer in plasma from 153 poststroke patients in the chronic phase (ie, 33 patients not receiving antiplatelet medication, 78 patients receiving 200 mg/d ticlopidine, and 42 patients receiving 40 mg/d aspirin), and compared the results in control subjects and among the treatment groups. RESULTS: The concentrations of fibrinogen, thrombin-antithrombin III complex, antithrombin III, plasmin-alpha 2 plasmin inhibitor complex, and tissue plasminogen activator were slightly but significantly increased in all treatment groups compared with control subjects (P < .01) but did not differ among the treatment groups. The plasminogen activator inhibitor-1 levels were significantly elevated in patients not receiving antiplatelet medication compared with control subjects (P < .01), whereas they were in the normal range and significantly lower in patients receiving ticlopidine or aspirin than in patients not receiving antiplatelet medication (P < .01). The plasminogen activator inhibitor-1 levels were significantly lower in patients whose platelet aggregation was inhibited by antiplatelet medication than in patients with uninhibited platelet aggregability (P < .05). CONCLUSIONS: These findings suggest that coagulation-fibrinolysis markers are mildly increased in poststroke patients in the chronic phase and that antiplatelet medication is effective in reducing the elevated plasminogen activator inhibitor-1 levels.
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