Objective — to estimate the long-term results of support rings «NeoCor» application for surgical correction of functional tricuspid insufficiency. Material and methods. The results of surgical treatment of 179 patients with acquired valvular mitral and/or aortic valve diseases were analyzed. Initially the average degree of functional tricuspid regurgitation was 3.0±0.5 with average values of systolic pulmonary artery pressure 53.1±14.2 mm Hg. Support rings «NeoCor» were applied to eliminate tricuspid regurgitation. Results. Mean follow-up was 4.4±0.8 years, completeness of observation — 86%, volume of observation — 598 patients-years. In long-term period there were significant reduction of mean systolic blood pressure in pulmonary artery to 26.5±4.5 mm Hg, satisfactory hemodynamic on tricuspid valve (mean diastolic gradient of 2.0±0.3 mm Hg, the average flow velocity — 75.9±5.7 cm/sec) and minimal residual regurgitation (0.5±0.5). Conclusion. Biological support rings «NeoCor» adequately correct the violation of intracardiac hemodynamics, provide functional efficiency and stable recovery of obturator function of the tricuspid valve in long-term period.