The stroke volume is equal to cross-sectional area (CSA) of the LVOT at the site of measurement ... Mild poststenotic dilatation and increased left atrium/aortic root transverse ratio is noted.

Syphilitic aortitis, resulting in aortic root dilation and severe aortic valve ... is more sensitive. Finally, the size of the aortic root can be measured, and aortic dissections identified.

and slight or no poststenotic aortic root dilatation. The degree of valvular calcification, which correlates with the severity of aortic stenosis, is seldom appreciated by the chest x-ray.

Aortic regurgitation can result from abnormalities of the aortic valve leaflets, dilation of the aortic root, or a severe increase in afterload. When the aortic leaflets are involved, there is ...