Katana VentraIP

Aortic arch

The aortic arch, arch of the aorta, or transverse aortic arch (English: /eɪˈɔːrtɪk/[1][2]) is the part of the aorta between the ascending and descending aorta. The arch travels backward, so that it ultimately runs to the left of the trachea.

For the embryological structure, see Aortic arches.

Aortic arch

Fourth left pharyngeal arch artery

Ascending aorta

Continues as descending aorta, thoracic part

Combination of superior and inferior vena cava

From its branches, the upper body, arms, head and neck. As a part of the aorta, the entire body, with exception of the respiratory zone of the lung and the heart.

arcus aortae

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Clinical significance[edit]

The aortic knob is the prominent shadow of the aortic arch on a frontal chest radiograph.[18]


Aortopexy is a surgical procedure in which the aortic arch is fixed to the sternum in order to keep the trachea open.


Aortic isthmus is the relatively fixed part of the aortic arch. It is prone to shearing force and trauma that can cause it to tear and result in massive bleeding.[3]

The arch of aorta can be seen here, with the lungs to either side and emerging from the heart, below.

The arch of aorta can be seen here, with the lungs to either side and emerging from the heart, below.

A branch of the vagus nerve, the recurrent laryngeal nerve, passes underneath the arch of aorta. The nerve is seen here.

A branch of the vagus nerve, the recurrent laryngeal nerve, passes underneath the arch of aorta. The nerve is seen here.