Aortic Root Z-Score Calculator

Comparing Multiple References


Body Surface Area:

The references and corresponding BSA values used for the z-score calculations are:

(height = 128.0 cm; weight = 28.0 kg)
BSA Reference BSA (m2) Cited by
Dubois 0.9980118891 Paris, Detroit
Haycock 0.996689577636 Boston
Boyd 1.01438996213 Halifax, Wessex

Demographic Data
Aortic Root Data
Site Measured (mm)


Validation and re-evaluation of a discriminant model predicting anatomic suitability for biventricular repair in neonates with aortic stenosis. Colan SD, McElhinney DB, Crawford EC, Keane JF, Lock JE. J Am Coll Cardiol. 2006 May 2;47(9):1858-65.
Regression equations for calculation of z scores of cardiac structures in a large cohort of healthy infants, children, and adolescents: an echocardiographic study. Pettersen MD, Du W, Skeens ME, Humes RA. J Am Soc Echocardiogr. 2008 Aug;21(8):922-34.
Dilatation of the ascending aorta in paediatric patients with bicuspid aortic valve: frequency, rate of progression and risk factors. Warren AE, Boyd ML, O'Connell C, Dodds L. Heart. 2006 Oct;92(10):1496-500
Nomograms for Aortic Root Diameters in Children Using Two-Dimensional Echocardiography. Gautier M, Detaint D, Fermanian C, Aegerter P, Delorme G, Arnoult F, Milleron O, Raoux F, Stheneur C, Boileau C, Vahanian A, Jondeau G. Am J Cardiol. 2010 Mar 15;105(6):888-894
Note: The measurements of the sinus of valsalva, st-junction, and ascending aorta were made at end-diastole for this reference.
Relationship of the dimension of cardiac structures to body size: an echocardiographic study in normal infants and children. Daubeney PE, Blackstone EH, Weintraub RG, Slavik Z, Scanlon J, Webber SA. Cardiol Young. 1999 Jul;9(4):402-10.