Synchronous phlebotonometry was performed on 30 lower extremities in 27 patients. Various pressure dynamics was observed in the proximal and distal segments of profound veins. Dynamic phlebohypertension was found not only in superficial but also in deep-seated veins. The escape of superficial veins resulted in normalization of pressure in both systems. The more intensive muscle contractions under conditions of normal blood circulation the greater a reduction of pressure phases in the crural vein distal segment this factor may be used as a test for estimation of the vein-muscle pump function.