Venous Thromboembolism

Venous thromboembolism, which involves venous thrombosis and pulmonary embolism, is a leading cause of morbidity and mortality in hospitalized patients and is being seen with increasing frequency in outpatients. This chapter discusses the risk factors, etiology, classification, pathophysiology, natural history, prognosis, diagnosis (including venous thrombosis, recurrent venous thrombosis, and pulmonary embolism), prophylaxis, and treatment of venous thromboembolism (including the pharmacology of antithrombotic agents), as well as venous thromboembolism in pregnancy and miscellaneous thromboembolic disorders (including thrombosis of unusual sites).  This review contains 8 figures, 16 tables, and 79 references. Keywords: Venous thromboembolism, pulmonary embolism, deep vein thrombosis, embolectomy, thrombolysis, hypercoagulability, duplex ultrasonography, D-dimer, anticoagulation