arch of the aorta


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

arch of the a·or·ta

the curved portion of the aorta between its ascending and descending parts; it begins as a continuation of the ascending aorta posterior to the sternal angle, runs posteriorly and slightly to the left as it passes over the root of the left lung, and becomes the descending aorta as it reaches and begins to course along the vertebral column; it gives rise to the brachiocephalic trunk, the left common carotid, and the left subclavian arteries;
Synonym(s): arcus aortae [TA], aortic arch

arch of the aorta

the proximal one of the four portions of the aorta, giving rise to three arterial branches called the innominate (brachiocephalic), left common carotid, and left subclavian arteries. The arch rises at the level of the border of the second sternocostal articulation of the right side, passes to the left in front of the trachea, bends dorsally, and becomes the descending aorta. Also called aortic arch.