Radiofrequency ablation (RFA) is the modern endovenous thermal method of treatment for varicose veins (VV) of the lower limbs 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 low-invasive and is carried out under tumescent anesthesia. In comparison with phlebectomy complications are rare. 75 patients, both sexes, 60% (n=45) women, 40% (n=30) men participated in this research. In preoperative period all patients underwent DS. Visual analog scale, 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 limbs. RFA can be recommended as alternative to phlebectomy.