A blockage in the proximal portion of the right subclavian artery will not only affect circulation to the right arm,but also to the

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The right subclavian artery gives rise to the right vertebral artery, which supplies blood to the brainstem and cerebellum. Therefore, a blockage in the proximal portion of the right subclavian artery will also affect circulation to the left vertebral artery, leading to reduced blood supply to the brainstem and cerebellum. It will not directly affect circulation to the left arm, left ventricle, right ventricle or left common carotid artery.

A Blockage in the Proximal Portion of the Right Subclavian