Left subclavian artery

Left Subclavian Artery

The left subclavian artery and its branches.

The Left Subclavian Artery is a major artery of the upper body, supplying blood to the left arm. It originates from the Aortic Arch and runs through the neck, chest, and shoulder.

Structure

The left subclavian artery arises from the aortic arch, behind the left common carotid artery. It ascends in the neck to the level of the thyroid cartilage, and then descends to the first rib's lateral border. Here it becomes the Axillary Artery.

Branches

The left subclavian artery gives off several branches:

• Vertebral Artery
• Internal Thoracic Artery
• Thyrocervical Trunk
• Costocervical Trunk

Clinical Significance

The left subclavian artery can be involved in several pathological conditions, such as Subclavian Steal Syndrome and Aortic Dissection.

See Also

• Right Subclavian Artery
• Subclavian Arteries
• Aortic Arch

References

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