In an in vitro PVAD model, the Sorin Bicarbon bileaflet valve demonstrated faster closure and higher maximum flow velocity but generated higher maximum Reynolds shear stress compared to the Medtronic Hall monoleaflet valve.
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Higher shear stress with S-B valve warrants caution in PVADs; leaves open optimal mechanical valve choice pending clinical data.
Lee et al. (2010) studied this question.
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