![]() Red planes correspond to the origin of the brachiocephalic artery (asterisk), left sub-clavian artery (dagger) and coeliac artery (double dagger), and divide the aorta into four segments of interest: the ascending aorta, aortic arch, descending thoracic aorta and abdominal aorta. Diameter was calculated according to the cross-sectional aortic surface in reference to the aortic wall's outer surface at planes in the middle of each aforementioned aortic segment and at the following additional planes perpendicular to the centre line: (i) the sinus of Valsalva-defined as the plane depicting the largest sinus dimension (ii) the proximal aortic arch-immediately proximal to the brachiocephalic artery orifice and (iii) the distal aortic arch-immediately distally to the left sub-clavian artery orifice. Length was defined as the centre-line distance between the planes defined above. Length and diameter were assessed in each aortic segment. The aorta was divided into four segments by appropriated planes perpendicular to the centre line: (i) the ascending aorta, beginning at the plane corresponding to the nadirs of all three aortic cusps and extending to the plane immediately proximal to the origin of the brachiocephalic artery (ii) the aortic arch, beginning at the plane immediately proximal to the origin of the brachiocephalic artery and extending to a plane immediately distal to the left sub-clavian artery's origin (iii) the descending thoracic aorta, beginning at a plane immediately distal to the origin of the left sub-clavian artery and extending to a plane immediately proximal to the coeliac artery and (iv) the abdominal aorta, beginning at a plane immediately proximal to the coeliac artery and extending to a plane at the aortic bifurcation (Fig. A centre line was created from the aortic valve annulus to the aortic bifurcation. One observer blinded to patient-identifying information performed the image analysis, using Aquarius Intuition (Terarecon, Inc., Foster City, CA, USA). The need for informed consent was waived. This retrospective study was approved by an institutional review committee. Excluded were patients with Marfan's syndrome, bicuspid aortic valve, severe atherosclerosis and any aortopathy. The computed tomography (CT) database at the Hospital of the University of Pennsylvania was reviewed for patients who had undergone electrocardiogram-gated CT angiography (CTA) of all aortic segments at one time in the past 2 years. Our aim was to determine aortic geometry across the adult age spectrum and to investigate the gender-related influence of aging on aortic morphometry. Given the smaller absolute aortic dimensions in women than men and the significantly increasing risk of aortic events in aging females, we hypothesized that aortic geometry changes occur in different patterns in both genders. Reproduced with permission from Rylski et al.ĭespite the growing interest in standardizing what constitutes as normal aortic dimensions, there are little data on gender- and age-related aortic geometry changes. Analysis of 2137 patients enrolled in the German Registry of Acute Aortic Dissection Type A. The blue area represents the 95% confidence interval. Predicted probability of male sex according to age in patients who underwent surgery for AADA. ![]()
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