Dynamical sonoelastography with technology of acoustic radiation force imaging (ARFI) and estimation of the shear wave elastography(SWE) were applied in 78 patients, suf' fering venous thrombosis (VTH), while presence of floating proximal part of thrombus. Empirical border index SWE is adduced, its value constitutes 2.5 m/s. Basing on the investigations results data, three categories of the VTH embologenic risk were estab' lished: high (SWE up to 2 m/s), middle (SWE 2 — 3 m/s), low (SWE over 3 m/s), what predicts the treatment tactics. Dynamical sonoelastography with ARFI technology and the SWE estimation permits to reveal embologenic forms of VTH objectively and to choose adequate tactics of the patients' treatment.