Z-scores of the aortic root at the level of the aortic annulus, sinuses of Valsalva, sinotubular junction, and ascending aorta. Measurements are from the parasternal long axis: aortic annulus measured in systole at the hinge points of the leaflets; sinuses, sinotubular junction and ascending aorta are measured in diastole using leading-edge to leading-edge technique. Data is from 353 normal children as reported by investigators at Hôpital Bichat, Paris, France.
Nomograms for Aortic Root Diameters in Children Using Two-Dimensional Echocardiography. Am J Cardiol. 2010 Mar 15;105(6):888-894.