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Coarctation of the aorta, or aortic narrowing (abbreviated as CoA), is a congenital condition whereby the aorta narrows in the area where the ductus arteriosus (ligamentum arteriosum after regression) inserts.: Coarctation (narrowing) of the aorta. 1:Inferior vena cava, 2:Right pulmonary veins, 3: Right pulmonary artery, 4:Superior vena cava, 5:Left pulmonary artery, 6:Left pulmonary veins, 7:Right ventricle, 8:Left ventricle, 9:Pulmonary artery, 10:Aorta.
pl. aortae, aortas [L.] the great artery arising from the left ventricle, being the main trunk from which the systemic arterial system proceeds. See Table 9. See also aortic. abdominal aorta. the part of the descending aorta within the abdomen. ascending aorta. the first part of the aorta which passes dorsally and cranially. descending aorta. the aorta after it turns caudally at the aortic arch. overriding aorta. see overriding aorta. supravalvular aorta. the portion of aorta immediately above the aortic valve. terminal aorta. the segment of the aorta immediately before it divides into the iliac arteries.