Figure 2.

MDCT AoAn evaluation: The center axis of left ventricle outflow tract and aortic root were chosen as reference with the 3 orthogonal planes. The longitudinal axis in coronal and sagittal views was aligned (A, B). The transverse plane was aligned at the lowest level of the valve until the hinge points of the aortic leaflets were depictable (C—transverse plane). Aortic annulus was defined as a virtual ring formed by joining the basal attachments of the aortic leaflets. Maximum diameter, minimum diameter, and area were measured at this level (D).