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

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?

A) Brachiocephalic Artery
B) Left internal carotid
C) Left subclavian
D) Right vertebral

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