Radiofrequency ablation (RFA) is the modern endovenous thermal method of treatment for varicose veins (VV) of the lower extremities which is characterized by high selective influence on patholologically changed vein. Intraoperative duplex sonography (DS) as an integral part of operation provides the precision of RFA treatment. The above-stated endovenous method is miniinvasive and is carried out under tumescent anesthesia. In comparison with phlebectomy complications are rare. 150 patients, both sexes, 60% (n=90) women, 40% (n=60) men were included in this research. In preoperative period all patients underwent DS. Visual analog scale (VAS), questionnaires of quality of life and sufficiency of treatment were used to asses the effectiveness of RFA and proved suprime results in treatment of VV of the lower extremities. RFA can be recommended as alternative to phlebectomy. © Published under licence by IOP Publishing Ltd.