Objective: to evaluate the effect of endovenous laser ablation of the great saphenous vein with miniphlebectomy on the hemodynamics of the deep veins of the lower extremities. Materials and methods. 35 legs of patients with chronic venous disease who underwent endovenous laser ablation of great saphenous vein with concomitant microphlebectomies enrolled in the study. Blood flow velocity of the common femoral vein and its diameter were measured before the operation, at one week and at one month of follow-up. Results. Mean blood flow velocity in the common femoral vein before operation was 25.7±2.1 cm/s, at 1 week — 29.4±2.2 cm/s, at 1 month — 30.5±1.9 cm/s. We found a statistically significant elevation of the blood flow velocity in the common femoral vein at 1 month (p=0.034). Mean diameter of the common femoral vein before operation was 10.6±0.5 mm, at 1 week — 10.5±0.4 mm and at 1 month — 9.9±0.6 mm (p>0.05). Conclusion. We can suppose that superficial venous surgery — endovenous laser ablation of the great saphenous vein with microphlebectomies can influence the deep vein hemodynamics by increasing the blood flow velocity in the common femoral vein at 1 month of follow-up.