Z-scores of the aortic root (aortic annulus, sinuses of Valsalva, sinotubular junction, and ascending aorta) are commonly reported for conditions such as Marfan syndrome, bicuspid aortic valve, and Kawasaki disease. This calculator consolidates the reporting of z-scores and reference ranges for the aortic root, based on numerous available publications. (Also see this page for reference values for adults.)
The specific manner in which these measurements are obtained is of obvious importance. All of the references cited by this calculator preceded the publication of the 2010 ASE Guidelines. In spite of that fact, most of the references use the same technique:
The reference data from Paris is performed using measurement techniques performed according to their interpretation of the then-current 2005 Guidelines:
Thus, the available references cited herein are not entirely comparable based on their dissimilar methodolgies.