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MMLU-Pro / 6802 / A 55-year-old man has had crushing substernal chest pain on exertion over the…

Problem

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question

A 55-year-old man has had crushing substernal chest pain on exertion over the past 6 weeks. He had a myocardial infarction 2 months ago. He takes nitroglycerin as needed and one aspirin daily. He has smoked two packs of cigarettes daily for 30 years. Examination shows normal heart sounds and no carotid or femoral bruits. Treatment with a β-adrenergic blocking agent is most likely to improve his symptoms due to which of the following mechanisms?

category

health

options

  1. Decreasing myocardial contractility
  2. Dilating the coronary arteries
  3. Peripheral vasodilation
  4. Preventing fibrin and platelet plugs

src

ori_mmlu-professional_medicine

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