Anatomy clinical correlates Quiz: Ace Your Exams

A 65-year-old man presents to his primary care physician for evaluation of new-onset hoarseness. The patient reports worsening hoarseness over several weeks without a precipitating cause. The patient has had no difficulty swallowing liquids or solids. He has a history of long-standing hypertension, mitral valve stenosis, and a twenty-pack-year smoking history. His vitals are within normal limits. Physical examination demonstrates an irregular heartbeat. A screening electrocardiogram is shown below. Which of the following structures is most likely implicated in this patient’s symptomatology?  


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