COMPLETE interruption of the arch of the aorta is a rarer condition than narrowing of an otherwise normally developed vessel. Accurate evaluation of the older literature is difficult because of frequent lack of sharp differentiation between, on the one hand, complete loss of continuity along the arch and, on the other, mere narrowing or even atresia with a cordlike vestige remaining. Abbott1 emphasized that complete disappearance of part of the aortic arch may happen in one of two sites: (a) in the descending arch between the orifice of the left subclavian artery and the entrance of the ductus arteriosus, which vessel forms the descending aorta, this type being merely an extreme form of the infantile variety of coarctation and (b) much more rarely, in the transverse arch just after the origin of the left common carotid and before that of the left subclavian artery, which vessel is given off
WEISMAN D, KESTEN HD. ABSENCE OF TRANSVERSE AORTIC ARCH WITH DEFECTS OF CARDIAC SEPTUMS: Report of a Case Simulating Acute Abdominal Disease in a Newborn Infant. Am J Dis Child. 1948;76(3):326–330. doi:10.1001/archpedi.1948.02030030336005
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