Aberrant right subclavian artery (arteria lusoria) diagnosed during transradial coronary catheterization

Aberrant right subclavian artery, or arteria lusoria, is the most common aortic arch anomaly. It is an uncommon condition, with an incidence of 0.2–1.7% (1). In this disorder four vessels arise sequentially from the aortic arch: the right common carotid artery, the left common carotid artery, the left subclavian artery and the aberrant right subclavian artery, which crosses upwards and to the right in the posterior mediastinum. It results from a disruption in the complex remodeling of the paired branchial arches, typically of the right dorsal aorta distal to the sixth cervical intersegmental artery (2,3).