4. Which of the following approaches to medical therapy is appropriate during unstable angina or non-ST elevation myocardial infarction?

A. The use of intravenous beta-blockers if there is tachycardia related to decompensated heart failure

B. All patients with unstable angina or non-ST elevation myocardial infarction should be on an angiotensin converting enzyme inhibitor (ACE inhibitor) upon hospital discharge as long as no contraindication exists

C. Dihydropyridine calcium channel blockers are recommended as a substitute for beta-blockers in patients with severe asthma and unstable angina or non-ST elevation myocardial infarction

D. Aldosterone antagonists in all unstable angina or non-ST elevation myocardial infarction patients if no contraindication exists

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