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arch of aorta
The arch of the aorta begins at the level of the sternal angle and arches over the root of the left lung in the superior mediastinum. It begins as the continuation of the ascending aorta and passes up, back, and left before turning backwards and downwards to become the descending aorta at the level of T4. It has anterior relations to the left lung and pleura and posterior relations to the trachea, esophagus, and thoracic duct. Its branches include the brachiocephalic trunk, left common carotid artery, and left subclavian artery.
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arch of aorta
- 1. Arch of Aorta downloadthese slides free of cost from www.slideshare.com
- 2. - Arch ofAorta is continuation of asc aorta at sternal angle - Begins and terminates at sternal angle - Connects ascg & descg aorta - Arches over root of left lung - Situated in sup mediastinum behind manubrium - Summit of arch reaches level of middle of manubrium Introduction
- 4. Course - Begins ascontinuation of ascg aorta behind Rt 2nd chondrosternal joint - Passes up, back and left infront of bifurcation of trachea - finally turns backwards & downwards behind the left bronchus n continues as descg aorta at lower border of T4 V
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- 7. Azygos vein TS atT4 V level CS- superior mediastinum
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- 9. Anterior & toleft – Lt pleura & lung Lt phrenic N left cardiac nerves (Inf cervical cardiac br of Xth N Sup cervical cardiac br Symp trunk Lt vagus Lt Rec laryngeal N hooks upwards below arch of aorta Lt sup IC vein
- 10. Posterior & toright – Trachea with deep cardiac plexus Oesophagus Lt Rec laryngeal nerve Thoracic duct Vertebral column
- 11. Inferior • Left bronchus •Bifurcation of pul trunk • Lig arteriosum • Left recurrent laryngeal nerve • Sup cardiac plexus
- 12. Superior • Brachiocephalic trunk •Lt commom carotid A • Lt subclavian A • Lt brachiocephalic vein
- 13. Branches - Rt brachiocephalictrunk – div into Rt CC & Rt SC artery - Lt common carotid artery - Lt subclavian artery - Occasionally Thyroidea Ima A & Vertebral A
- 14. Brachiocephalic trunk Lt Common Carotid LtSubclavian Branches Arch of Aorta
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- 22. Coarctation of aorta localisednarrowing of aorta distal to Left Subclavian origin 1.Preductal 2.Postductal 3.Juxtraductal collateral circulation b/w SC & Descg Thoracic aorta • Notching of ribs • Pulsating scapula
- 25. Aortic aneurysm –localised dilatation of aorta
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