Calculate Z-Scores of the ascending aorta and aortic root using data published in 2006 from Halifax, Nova Scotia. Per the authors: "Measurements were made in systole... in the parasternal long axis... from inner edge to inner edge. The ascending aorta was measured at the level of the right pulmonary artery."
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. Epub 2006 Mar 17. PMID: 16547208