Aortic Root Z-Score Calculator

Comparing Multiple References

Results

Aortic Valve: (15.5mm)

Reference Z-Score Mean Range
Boston 0.02 15.47 12.68 - 18.27
Wessex -1.30 16.92 14.83 - 19.30
Detroit -0.06 15.59 12.82 - 18.97
Halifax 0.03 15.46 12.61 - 18.95
Paris (boys) -0.38 16.10 13.24 - 19.59
Paris (girls) -0.08 15.63 12.85 - 19.01

Match your measurement technique to the references:
Vascular structures were measured during

Sinus of Valsalva: (25.0mm)

Reference Z-Score Mean Range
Boston 2.22 20.17 15.90 - 24.43
Wessex 2.56 20.74 17.98 - 23.93
Detroit 1.52 21.15 17.07 - 26.22
Halifax 1.88 20.64 16.91 - 25.20
Paris (boys) 1.20 22.18 18.23 - 26.98
Paris (girls) 1.33 22.18 18.59 - 26.46

Sinotubular Junction: (18.0mm)

Reference Z-Score Mean Range
Wessex 0.44 17.32 14.62 - 20.53
Detroit 0.44 16.96 13.04 - 22.06
Halifax 0.59 16.86 13.60 - 20.91
Paris (boys) -0.09 18.16 14.93 - 22.09
Paris (girls) -0.10 18.16 15.22 - 21.66

Ascending Aorta: (21.0mm)

Reference Z-Score Mean Range
Halifax 1.54 18.25 15.26 - 21.81
Paris (boys) 1.32 18.16 14.64 - 22.53
Paris (girls) 1.45 18.16 14.93 - 22.09

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)
 

References:

Boston
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.
Detroit
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.
Halifax
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
Paris
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.
Wessex
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.