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Comparison of peak systolic energy loss (EL′) in: (a) the thoracic aorta of normal volunteers, dilation-only patients, and in dilated/stenosis patients. (b) EL′ in the ascending aorta of the same cohorts. The individual box plots show the distribution of energy loss in each cohort (circle = mean, box = 25%–75% quartiles, whiskers = extrema).
