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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.
The function of the aorta is to pump this new oxygen-rich blood from the left ventricle of the heart, where the oxygenated blood is deposited, and circulate it back into the body. The shape of the aorta assists with blood circulation. It has four main sections: the ascending aorta, the aortic arch, the descending thoracic aorta and the abdominal aorta. The ascending aorta begins at the semilunar valve of the left ventricle and connects to the coronary arteries.