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The article presents an assessment of anticoagulant effect of rivaroxaban in 35 patients with thromboembolic diseases. The results of expressed anticoagulant effect of rivaroxaban were obtained during a day (or more). The data of increase in sensitivity to thrombomodulin indicated about work enchancement of protein C system against the background of rivaroxaban therapy.

Bernard-Soulier disease, a congenital macrocytic thrombocytopathy, was first described in 1948. Currently, this pathology has again attracted the attention of many researchers, as the study of its pathogenesis has deepened the understanding of the mechanisms of the hemostatic process concerning the interaction of platelets with the damaged vessel wall. This rare disease (70 cases were described by 1983) is inherited as an incomplete autosomal recessive trait and is observed with equal frequency in males and females. Bleeding from mucous membranes of the nose, mouth and other organs, petechiae and ecchymoses on the skin usually appear in early childhood. Hemorrhagic syndrome is usually of moderate severity, but often (in 17% of patients) is the direct cause of death due to bleeding from the gastrointestinal tract or hemorrhage in the brain and its membranes.