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Figure 4 Correlation between mean transvalvular gradients observed in patients and the projected indexed EOA calculated by indexing the normal values of valve EOA for patients’ body surface area. Normal values of EOA were determined for each model and size of prosthesis using a previous study from our laboratory (1). The normal value of EOA for the St-Jude X-Cell stented valve was not available in the published literature. Panel A and panel B show this relation for mean gradient measured at rest and during peak exercise. (open circle) = Stentless bioprostheses; (solid circle) = stented bioprostheses. EOA = effective orifice area.
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