Modes of bioprosthetic valve failure: a narrative review

Purpose of review A thorough understanding of the modes of bioprosthetic valve failure is critical as clinicians will be facing an increasing number of patients presenting with failed bioprostheses in coming years. The purpose of this article is to review modes of bioprosthestic valve degeneration, their management, and identify gaps for future research. Recent findings Guidelines recommend monitoring hemodynamic performance of prosthetic valves using serial echocardiograms to determine valve function and presence of valve degeneration. Modes of bioprosthetic valve failure may be categorized as structural degeneration (calcification, tears, fibrosis, flail), nonstructural degeneration (pannus), thrombosis, and endocarditis. Calcification is the most common form of structural valve degeneration. Predictors of bioprosthetic valve failure include valves implanted in the mitral position, younger age, and type of valve (porcine versus bovine pericardial). Failed bioprosthetic valves are managed with either redo surgical replacement or transcatheter valve-in-valve implantation. Summary Several modes of bioprosthetic valve failure exist, which vary based on patient, implant position, and valve characteristics. Further research is required to characterize factors associated with early failure to delay structural valve degeneration and improve patient prognosis.