Post-delivery Graphic Anatomy of COA by Childrens’ Hospitals and Clinics of MN
Above. Post-delivery anatomy. A narrowing of the aorta is defined as coarctation of the aorta (COA). COA may be classified as to its relationship to the ductus arteriosus (DA), the connection between the pulmonary artery and ascending aorta, which normally closes after birth. The narrowing of the aorta may then be ductal, pre-ductal, or post-ductal. COA is frequently associated with other cardiac defects, and occurs more commonly in males than females and in patients with Turner’s syndrome. In infants who are symptomatic at birth, the closure of the ductus results in reduction of oxygenated blood to the body, especially in those infants with other cardiac defects. COA is important to diagnose prior to birth, but often requires a transverse view of the mediastinum, especially the 3 vessel tracheal view, which allows assessment of the transverse aortic arch.