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Abstract
Prosthesis-patient mismatch is present when the effective orifice area of the inserted
prosthetic valve is less than that of a normal human valve. This is a frequent problem
in patients undergoing aortic valve replacement, and its main hemodynamic consequence
is the generation of high transvalvular gradients through normally functioning prosthetic
valves. The purposes of this report are to present an update on the concept of aortic
prosthesis-patient mismatch and to review the present knowledge with regard to its
impact on hemodynamic status, functional capacity, morbidity and mortality. Also,
we propose a simple approach for the prevention and clinical management of this phenomenon
because it can be largely avoided if certain simple factors are taken into consideration
before the operation.