A 67-year-old man with dyslipidemia is evaluated due to occasional dizziness. His symptoms are exacerbated while carrying weights in the gym. The patient is a known case of coronary artery disease. The patient is a heavy smoker and alcoholic. He does not have orthostatic hypotension. ECG reveals normal sinus rhythm. Doppler ultrasound evaluation of the right vertebral artery reveals retrograde (caudal) flow. Which of the following arteries is most likely to be occluded based on these findings?

Question

Quizplus · Accepted Answer

Eductional Objective: Subclavian steal syndrome originates from the stenosis in the subclavian artery proximal to the origin of the vertebral artery. This leads to the reversed blood flow from the contralateral vertebral artery to the ipsilateral vertebral artery. The symptoms include vertigo and dizziness. The symptoms are exacerbated with arm exercise.

A 67-Year-Old Man with Dyslipidemia Is Evaluated Due to Occasional