Aortic valve replacement with stentless bioprosthesis "Kemerovo-AB-Neo"
We analyzed 50 aortic valve replacements (AVR) with «Kemerovo-AB-Neo» stentless bioprostheses. Mean age was 66.7±5 (54 to78) years, hospital mortality rate accounted for 2%. The peak transprosthetic pressure gradient (PTPG) in patients operated for aortic stenosis came to 19.5±7 mm Hg. PTPG was shown to be dependent on the implantation technique; it reached 24.5±7 mm Hg when in order to fix the proximal line, interrupted sutures were used and ran to 17±5 mm Hg in the case of running sutures (р = 0.03). Helical CT confirmed fine mobility of the cardiac structures after «Kemerovo-AB-Neo» implantation: the aortic cross-section area varied up to 84% during the cardiac cycle. It should be noted that AVR with «Kemerovo-AB-Neo» stentless valves gives good clinical and hemodynamic results early after surgery. A «free-hand» technique of implantation should be preferred. The implantation of stentless bioprostheses retains cardiac structures mobility and natural aortic root dimensions after performing an AVR.