. The need in lifelong anticoagulants and complications associated with implantation of mechanical prostheses constantly stimulate biological tissues development and manufacturing. Clinical experience has demonstrated hemodynamic advantages with stentless biological prostheses over prostheses with the frame. In our center developed stentless xenopericardial bioprostheses implanted in the position of the aortic valve using one row of suture line, that probably can improve long-term results.
Obective. The aim of our study is assessment of intermediate results of the first stentless BioLAB–KB/A xenopricardial bioprosthesis implantation.
Material and methods. From January 2007 and March 2013 in aortic valve position have been implanted 50 stentless bioprostheses. The average age amounted 69.9 ± 3,8 (from 49 to 79 years). 20 (40%) men and 30 (60%) women. Etiology of AV disease were – degeneration in 33 pts. (66%), congenital in 11 pts. (22%), rheumatism in 3pts. (6%), endocarditis in 3 pts. (6%). For the implantation of bioprosthesis was used subcoronary supraannular technique using one row sutureline. Isolated aortic valve replacement was performed in 25 patients. Concominant procedures were performed in following patients: CABG in 15 patients, mitral valve reconstruction in 7 patients, mitral valve replacement 1 patient, tricuspid valve reconstruction in 9 patients, pulmonary valve replacement in 1 patient.
Results. Hospital mortality was 8% (4 patients). Heart failure in 2 cases, bleeding in 1 case, multiple organ failure in other one. In the isolated AV replacement the CPB time was 136,2 + 25,8 (103–240 minutes), and the aorta cross-clamp time was 76,6 ± 5,1 (64–95 minutes). The follow-up in long-term period was 38.8 ± 16,4 months (from 66 to 6). 3 deaths were in long-term period – from cancer in 2 cases, from alcoholism in 1. All patients were in NYHA class I and II. In all prostheses we had excellent hemodynamics, symmetric leaflet closure and none or trivial regurgitation.
Conclusion. BioLAB–KB/A stentless bioprosthesis implanted using single sutureline technique demonstrates good hemodynamics and provides satisfactory immediate and intermediate results. This bioprosthesis and the technique of implantation can be recommended for widespread clinical usage.
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