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Aortic arch definition11/23/2023 In this case, the right sided aortic arch does not joint the ductus forming a V nor a U shaped confluence. Right-sided aortic arch with mirror image branching. This segment becomes more apparent with the regression of the ductus arteriosus in the postnatal period.Ģ. The proximal part of the aberrant left subclavian artery that carries the blood from the ductus to the descending aorta during fetal life remains dilated as a diverticular pouch called the diverticulum of Kommerell. ![]() The confluence of the ductus and the right sided aortic arch behind the trachea and esophagus forms a U shaped image, typical for this clinical variety. In these cases, the right subclavian artery arises from the descending aorta and runs rightward behind the trachea and the esophagus. Right-sided aortic arch with aberrant right subclavian artery. In the case of the right sided aortic arch, it remains in the middle of the U, between the two great vessels.ġ. Normally, it is located laterally to the aortic arch. The second thing we must look for is the trachea. When we found a U image, then we must think of the right aortic arch. The aortic arch is located to the right of the trachea instead of its normal left position.Īlways look at the V shape configuration of the three vessel and trachea view. In the case of the right sided aortic arch, we don"t see the normal V shape configuration, because there is a gap between the ascending aorta and the mean pulmonary artery. The three-vessel and trachea view is part of the routine exploration of the fetal heart. If the right dorsal aorta persists and the distal left aorta disappears, then we have a right aortic arch. Normally, the aortic arch is formed by the left fourth aortic arch and the left dorsal aorta. The embryological origin consists of an abnormal development of the fourth branchial arch. ![]() The diagnosis has come more frequent since the position of the aortic arch is systematically included in the routine fetal exploration. It"s been suggested a 1 of 1000 pregnancy rate in a low risk population. Right-sided aortic arch is the most common arch anomaly in pediatric patients. It does not refer to which side of the midline the aorta ascends." "The left or right sidedness of the aortic arch refers to the position of the aortic arch relative to the trachea. Unitat de Medicina Materno fetal (Diagnòstic Prenatal) Hospital de l"Esperit Sant.
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