Difference and similarity between type A interrupted aortic arch and aortic coarctation in adults: Two case reports

Figure 1 Type A IAA in a 54-year-old woman. A: Reformatted oblique sagittal image of the aorta shows interruption of the aorta just distal to the subclavian artery origin (orange arrow). Note the maintenance of curvature of the ascending aorta and the extension of the interrupted aorta beyond the left subclavian artery several centimeters; B: Aneurysm formation in the descending aorta (white arrow); C: Maximum intensity projection shows a massive aorta which included two full-fledged collateral networks ensuring blood circulation to the distal aorta. AA: Ascending aorta; DA: Descending aorta; BCT: Brachiocephalic trunk; LCCA: Left common carotid artery; LSA: Left subclavian artery.

Figure 2 Severe coarctation in a 61-year-old woman. A: Reformatted oblique sagittal image of the aorta shows coarctation of the aorta just distal to the subclavian artery origin (white arrow) and slight enlargement of the proximal descending aorta. The ascending aorta maintains normal curvature and the narrowing is a few centimeters away from the subclavian artery; B: Maximum intensity projection shows collateral flow which included two full-fledged collateral networks ensuring blood circulation to the distal aorta. LSA: Left subclavian artery.