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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.
A tortuous aorta is an aorta with a twisted or distorted shape. A tortuous aorta may increase the risk for a variety of conditions or complications, according to the Cleveland Clinic. The aorta is the largest artery in the human body, and distributes freshly oxygenated blood from the heart to the rest of the body. The aorta is divided anatomically into four segments: the ascending aorta, aortic arch, thoracic aorta and abdominal aorta. The ascending aorta originates at the opening of the aortic valve of the heart, and shares a pericardial sheath with the pulmonary trunk.