the right brachiocephalic arterial trunk
arises at the level of the right
sternoclavicular joint, the left aortic arch
Direct born inside the chest
Divided Into
Left subclavian artery
Thoracic portion:
Da branches that supply the
thoracic structures (only the
left subclavian artery).
Pre-escalénica portion:
The subclavian artery and
vein are separated, leaving
the vein in the ventral
anterior scalene muscle and
the artery behind
Divided Into
On its way intrathoracic
(1) Ahead: the left common carotid
artery and vagus nerve. (2) Behind:
the bodies of the cervical vertebrae.
(3) Inside: the esophagus, trachea,
left, and the thoracic duct.
(4) Outside: the pleura and lung
At the base of the neck
(1) Ahead:With the subclavian vein
and innominate vein, strap muscles
sternoclavicular joint (2) Behind:
with the recurrent laryngeal nerve,
pleural dome and suspensory
ligaments, vertebropleurocostal
(3) Below: with intrathoracic fascia,
the handle subclavian and phrenic
nerve anastomosis with the inferior
cervical ganglion. (4) Above: with
the thoracic duct
Right subclavian artery
Interscalene portion:
Deep to the anterior
scalene, both are related
(1) Ahead: the anterior scalene
muscle. (2) Behind: the brachial
plexus. (3) Below: with the first rib.
(4) Above: with brachial plexus
Post-escalénica Portion
(1) Inside: with the first fingering
serratus anterior muscle. (2) Outside:
the clavicle and the subclavian muscle.
(3) Behind: the brachial plexus