SUBCLAVIAN STEAL SYNDROME - Aortic arch syndrome, also referred to by many as vertebral-basilar artery disease, carotid artery occlusive syndrome, and subclavian steal syndrome is characterized by a constellation of signs and symptoms which occur secondary to abnormalities in the major arteries which extend off of the aortic arch. These abnormalities are structural and most often secondary to the effects of atherosclerosis, blood clots, trauma, or a congenital abnormality. Symptoms of this condition include various neurologic symptoms, reduction in pulse, and changes in blood pressure.