Abstract
The aim of this report was to determine the frequency of thrombocytopenia in a cohort of 1,126 patients receiving oral anti- coagulant therapy (OAT), and to compare the grade of thrombocy- topenia and the severity of bleeding complications. Severe thrombo- cytopenia was observed in five patients, and moderate and light thrombocytopenia were observed in 208 patients. Thrombocytopenic patients receiving OAT presented five major and six minor hemor- rhages. The presence of hepatitis markers and autoantibodies was assessed. All parameters at the time of the bleeding complication were in the therapeutic range.
