Anatomic Characterization of the Aortic Root in Patients With Bicuspid and Tricuspid Aortic Valve Stenosis: Does Fusion of Doppler-Echocardiography and Computed Tomography Resolve Discordant Severity Grading?

Up to 30% of patients with aortic stenosis (AS) present with discordant grading (aortic valve area [AVA] <1 cm2, but the mean pressure gradient [MPG] ≥40 mm Hg), raising uncertainty regarding the degree of AS severity [(1)][1]. The aortic root is elliptical and transthoracic echocardiography (