Thoracic aortic aneurysms (TAA) are defined as aorta diameter greater than 1.5 times the
expected size by 11 stakeholder medical societies. 1, 2 Enlarged aortas less than 1.5 times
the expected size are termed ectasia, 1, 2 whereas aortas within 2 standard deviations of
population means are considered normal. 3, 4 Dilatation is synonymous with ectasia or
aneurysm. 5 A logistical challenge in diagnosing TAA according to current definitions is the
dependence of expected aorta diameter on age, sex, and body size, thus requiring …