Objective: To explore the effects of Buyang Huanwu Decoction (BHD) on brain tissue pathologic morphology and expression of nitric oxide (NO), von willebrand factor (vWF) and 6- keto prostaglandin 1α (6-keto-PGF1α) in rat model of MCAO at different time points. Methods: The rat model of MCAO was established by the method of nylon monofilament via the internal carotid artery. The pathologic morphology of brain tissues after ischemia in day 1, day 3 and day 7 were observed by hematoxylin-eosinstaining (HE) and transferase-mediated deoxyuridine t...