Anatomy and radiology of the variations of aortic arch branches in 1,266 patients. Vučurević G, Marinković S, Puškaš L et-al. Anatomical variations of aortic arch branching: evaluation with computed tomographic angiography. Frequency of variations in aortic arch anatomy depicted on multidetector CT. Circumflex retroesophageal aorta mimicking aortic interruption: a rare cause of aortic obstruction in a neonate. common origin of both common carotid arteries.aberrant left subclavian artery (right-sided arch).aberrant right subclavian artery (in 0.6% of cases) 5.variant origin of vertebral arteries (2.5-6% of cases) 4,5.thyroidea ima artery (between 4-10 % of cases).bovine arch (commonest, occurring in 10-20% of the population) 4,5.Other arch anomaliesĪbnormal formation of the 1 st, 2 nd and 3 rd arch vessels results in abnormal branch vessels: A right aortic arch occurs when the aorta, the large vessel that takes oxygenated (red) blood from the left side of the heart to the body, branches off to the. Commonly, failure of normal regression of the 4 th arch vessels results in a double aortic arch or right-sided aortic arch. When there is departure from normal development, variant anatomy occurs. ![]() During development, the two dorsal aortae fuse to form the descending aorta, the ventral aortic limbs fuse to form the aortic sac, the left 4 th arch vessel becomes the aortic arch and the right 4 th arch vessel becomes atretic distally. The arch gives off three branch vessels, the brachiocephalic (also called the innominate), left common carotid and left subclavian arteries.Īortic development is a complex process that takes place during the third week of gestation. Normally, the aorta ascends in the superior mediastinum to the level of the sternal notch before arching posteriorly and descending in the left hemithorax. It results in a number of heterogenous anomalies of the aorta and its branch vessels. ![]() Variant anatomy of the aortic arch occurs when there is failure of normal aortic development.
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