Purpose: Deep vein thrombosis (DVT) refers to thrombi formation and blood stasis in the deep veins of the extremities. This study was to determine the effectiveness of DVT treatment in our clinic. Method: All of 73 patients who diagnosed Deep Venous Thromboses with dupplex ultrasoun between december 2010 and may 2012, at our institution were enrolled in this study. The mean age of the patients was 55.205 ± 18.12 (Min: 22, Max: 84). Standart DVT treatment was applied. We re-evaluated the change in deep venous system using follow-up Dupplex ultrasonography after 6 months.The patients were observed according to etiology. Results: Etiologic factors were insufficient prophylaxis after surgery (30 patients), malignancy (9 patients) and idiopathic (34 patients). Deep venous thrombosis existed left lower extremity (n=39), right lower extremity (n=21) and bilateral lower extremity (n=13). Thrombosis vein segment of all patients were evaluated with duplex ultrasonography after 6 months. Radiologic findings of thrombosis disappeared in 54 patients (73%). Thrombosis segment were recanalization in 12 patients (16.4%). Thrombosis was not recovery in 7 patients (8.5%). Conclusion: If treatment and prophylaxis of deep venous thrombosis perform enough, recurrence decreases and recanalization and lysis of thrombosis increase. Eventually mortality and morbidity of cases decrease.