New equations for calculating z-scores of the coronary arteries using body surface area or aortic valve diameter. Coronary segments include the circumflex and distal right coronary artery in addition to the usual proximal segments (LMCA, LAD, RCA). Based on data from over 1,000 infants, children, and adolescents seen in Montreal, Quebec, Canada. Particular attention was paid to ensuring the data conforms to a normal distribution— an essential point for properly interpreting z-score results.
New Equations and a Critical Appraisal of Coronary Artery Z Scores in Healthy Children.
J Am Soc Echocardiogr. 2010 Nov 12. [Epub ahead of print]