A client who is transferred to the cardiac rehabilitation unit after a myocardial infarction is ready for discharge with a new prescription for metoprolol (Lopressor). The client asks, I don't have high blood pressure, so why did my healthcare provider give me this medicine? What information should the practical nurse (PN) provide?A) Anticoagulation is the most important action of metoprolol.B) Beta-blockers are routinely prescribed after heart damage.C) Heart failure is prevented as a complication while healing.D) A slower heart rate reduces the heart's oxygen demand.

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