title: Stented bioprostheses in aortic position.
abstract: BACKGROUND
  Biological stented prostheses are currently the main type of prosthetic valve used for aortic valve replacement. The ratio of bioprotheses to mechanical prostheses has switched in the last 15 years; the percentage of biological  prostheses implanted has risen from 30 % to 85 %. Moreover the total number of implanted stented bioprostheses remained stable over the last years despite competing procedures like stentless prostheses or transcatheter aortic valve implantation.
  
  
  METHODS
  A literature search of all published aortic valve replacement studies was performed from January 2000 through May 2012.
  
  
  RESULTS
  The recommendations guiding the type of heart valve replacement have been revised in recent years. Of particular interest are the new generation of biological prostheses with extended durability, a decrease in mortality of reoperation and an increase in life expectancy. Comorbidities such as chronic renal insufficiency or chronic atrial fibrillation are no longer contraindications to bioprostheses.
  
  
  CONCLUSIONS
  Overall, even in face of more innovative biological alternatives the implantation of stented bioprostheses is still a very interesting option and represents actually the most frequent valve implantation technique for aortic stenosis.
authors: Department of Cardiovascular Surgery, Christian-Albrechts-University of Kiel, Kiel, Germany.
authors: J
authors: J
authors: Cremer
authors: J
authors: J
authors: Schöttler
authors: R
authors: R
authors: Petzina
authors: G
authors: G
authors: Hoffmann
keywords: aortic valve replacement; effective orifice area; patient-prosthesis mismatch; quality of life; stented bioprostheses