This aortic arch passes over the right main bronchus to the right of trachea and oesophagus. ДЄ circumflex aorta with a right aortic arch refers to a retroesophageal right aortic arch, a left-sided descending thoracic aorta, and a left-sided ligamentum arteriosum. The mirror image of the usual form of circumflex aorta, with left aortic arch and right descending aorta, is very rare, and may require a different surgical approach. When there is also obstruction of the proximal aberrant subclavian, it can be confused clinically with aortic dissection in adult patients. The aortic arch is often unobstructed or presents with variable degrees of obstruction from hypoplasia to near-interruption requiring major arch repair. Simple vascular ring division may not fully address all the deleterious effects of circumflex aorta, and a major aortic arch uncrossing procedure may be required. In the majority of cases an associated KommerellвЂ™s diverticulum with an aberrant left subclavian artery also gives rise to a left-sided arterial duct, which forms a complete vascular ring. The term is most commonly used to refer to an aorta that passes to the right of the trachea (i.e., a right aortic arch), which crosses the midline behind the oesophagus above the airway carina, to become continuous with the proximal descending thoracic aorta on the opposite side. Circumflex aorta is an unusual form of congenital aortic arch anomaly with a retroesophageal arch segment.

Aortic arch