Bioprosthetic aortic valve degeneration: a review from a basic science
perspective
Abstract
Background The increase in the prevalence of aortic stenosis due to an
aging population has led to an increasing number of surgical aortic
valve replacements. Over the past 20 years, there has been a major shift
in preference from mechanical to bioprosthetic valves. However, despite
efforts, there is still no “ideal” bioprosthesis. It is crucial to
understand the structure, biology, and function of native heart valves
to design more intelligent, strong, durable and physiological heart
valve tissues. Methods A comprehensive review of the literature was
performed to identify articles reporting the basic mechanisms of
bioprosthetic valve dysfunction and the biology of native valve cells.
Searches were run in PubMed, MEDLINE® and Google Scholar. Search terms
included subject heading and keywords for the following terms:
“biological heart valve dysfunction”, “bioprosthesis dysfunction”,
“bioprosthesis degeneration” and “tissue heart valves” Results All
the relevant findings are summarized in specific illustrations and
tables within the appropriate subsections. Structural dysfunction is a
logical and expected consequence of the chemical, mechanical and
immunological processes that occur during fixation, manufacture, and
implantation. Conclusion Biological prosthesis valve dysfunction is a
clinically significant process. It has become a major issue considering
the growing rate of bioprosthesis implantation and improved long-term
patient survival. Research on the field has improved in the past few
years but there is still not an ideal bioprosthesis. Understanding
bioprosthetic aortic valve degeneration from a basic science perspective
is a key point to improve technologic advances and specifications that
lead to new generation of bioprosthesis.