Aortic Coarctation [Disease/Finding] A birth defect characterized by the narrowing of the AORTA that can be of varying degree and at any point from the transverse arch to the iliac bifurcation. Aortic coarctation causes arterial HYPERTENSION before the point of narrowing and arterial HYPOTENSION beyond the narrowed portion. Coarctation of the Aorta Aortic Coarctation M0001549 D001017 1024518 Coarctation of Aorta C1056 N0000000439 Aortic Coarctation C0003492 7305005 Heart Defects, Congenital [Disease/Finding]