Arch of Aorta

 𝕎𝕙𝕒𝕥 𝕚𝕤 𝕚𝕥?

 The arch of the aorta is the curved part of the aorta connecting the ascending aorta to the descending thoracic aorta.

 It lies behind the manubrium of the sternum.

 ℙ𝕒𝕣𝕥𝕤 𝕒𝕟𝕕 ℂ𝕠𝕦𝕣𝕤𝕖

 Starts: At the 2nd right sternocostal joint

 Arches: Upwards, backwards, and to the left over the left main bronchus

 Ends: At the T4 vertebral level (becomes descending aorta)

 𝕄𝕒𝕛𝕠𝕣 𝔹𝕣𝕒𝕟𝕔𝕙𝕖𝕤 (Mnemonic: “ABC”)

 A – Aortic Arch gives off:

 B – Brachiocephalic trunk

– Divides into right subclavian & right common carotid arteries

 L – Left Common Carotid artery

 L – Left Subclavian artery

Easy mnemonic:

Brachiocephalic, Carotid (left), Subclavian (left)

 ℝ𝕖𝕝𝕒𝕥𝕚𝕠𝕟𝕤

 Anterior: Left vagus & phrenic nerves, thymus remnant

 Posterior: Trachea, esophagus, thoracic duct

 Inferior: Pulmonary artery bifurcation, left bronchus

 ℂ𝕝𝕚𝕟𝕚𝕔𝕒𝕝 ℝ𝕖𝕝𝕖𝕧𝕒𝕟𝕔𝕖

 Aneurysm: Dilation of the arch compresses nearby structures →

– Dysphagia (esophagus)

– Hoarseness (left recurrent laryngeal nerve)

 Coarctation of Aorta: Congenital narrowing just beyond the arch

 Trauma: Deceleration injuries may tear the arch (life-threatening)

Raiyyan Tahsan Date:-09-07-2025 Wednesday Time:-08-39-23 Pm