[Present-day problems of venous thromboses]

Venous thrombosis (VT) is a frequent pathology associated with a high mortality. A high risk of VT is associated with a variety of diseases, syndromes, and situations, connected with a congenital predisposition (thrombophilia) or not. Clinical and instrumental data in VT are non-specific. The diagnosis of these conditions is very difficult. Correct and timely treatment decreases mortality associated with pulmonary arterial thromboembolism (PATE). Unfortunately, this index is still very high: a lot of patients die within first minutes and even seconds of the moment of pulmonary arterial obturation with a thrombus. All this suggests that PATE belongs to diseases that are easier to prevent than to treat. In connection with this, a doctor examining a patient must always keep the possibility of VT and PATE in mind and evaluate the risk of their development, thus taking a decision concerning the necessity, duration, and a method of preventive treatment.