Аннотация:The authors formulate an observational problem concerning gas kinematics in the central parts of Seyfert galaxies with the extended NLR for being setting at the 6-m telescope. As the first results they present an investigation on Mrk 573. The picture obtained in this paper is in accordance with the theoretical models of gas response in the non-axisymmetrical gravitational field of bar and contradicts the hypothesis of relativistic jet phenomenon in the center of Mrk 573.