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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.
Coarctation of the aorta: Narrowing of the aorta between its branches to the arms and those to the legs. This birth defect causes heart strain due to high blood pressure in the upper body. Bicuspid aortic valve: 1% to 2% of people have an aortic valve with two leaflets instead of three.