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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.
CoA is one of several common types of congenital heart malformations. CoA may occur alone, or together with other abnormalities in the heart. CoA is seen more frequently in boys than girls. It is also associated with other congenital heart defects, such as Shoneâs complex and DiGeorge syndrome.oarctation of the aorta (CoA) is a congenital malformation of the aorta. The condition is also known as aortic coarctation. Either name indicates a constriction of the aorta.