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- W2755361856 abstract "Background Wall shear stress ( WSS ) is a stimulus for vessel wall remodeling. Differences in ascending aorta ( AA o) hemodynamics have been reported between bicuspid aortic valve ( BAV ) and tricuspid aortic valve patients with aortic dilatation, but the confounding impact of aortic valve stenosis ( AS ) is unknown. Methods and Results Five hundred seventy‐one subjects underwent 4‐dimensional flow magnetic resonance imaging in the thoracic aorta (210 right‐left BAV cusp fusions, 60 right‐noncoronary BAV cusp fusions, 245 tricuspid aortic valve patients with aortic dilatation, and 56 healthy controls). There were 166 of 515 (32%) patients with AS . WSS atlases were created to quantify group‐specific WSS patterns in the AA o as a function of AS severity. In BAV patients without AS , the different cusp fusion phenotypes resulted in distinct differences in eccentric WSS elevation: right‐left BAV patients exhibited increased WSS by 9% to 34% ( P <0.001) at the aortic root and along the entire outer curvature of the AA o whereas right‐noncoronary BAV patients showed 30% WSS increase ( P <0.001) at the distal portion of the AA o. WSS in tricuspid aortic valve patients with aortic dilatation patients with no AS was significantly reduced by 21% to 33% ( P <0.01) in 4 of 6 AA o regions. In all patient groups, mild, moderate, and severe AS resulted in a marked increase in regional WSS ( P <0.001). Moderate‐to‐severe AS further increased WSS magnitude and variability in the AA o. Differences between valve phenotypes were no longer apparent. Conclusions AS significantly alters aortic hemodynamics and WSS independent of aortic valve phenotype and over‐rides previously described flow patterns associated with BAV and tricuspid aortic valve with aortic dilatation. Severity of AS must be considered when investigating valve‐mediated aortopathy." @default.
- W2755361856 created "2017-09-25" @default.
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- W2755361856 date "2017-09-22" @default.
- W2755361856 modified "2023-10-15" @default.
- W2755361856 title "Aortic Valve Stenosis Alters Expression of Regional Aortic Wall Shear Stress: New Insights From a 4‐Dimensional Flow Magnetic Resonance Imaging Study of 571 Subjects" @default.
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- W2755361856 doi "https://doi.org/10.1161/jaha.117.005959" @default.
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