How effective are medications such as beta-blockers or ACE inhibitors in improving outcomes and preventing complications after a myocardial infarction, and what are their specific benefits and potential risks for patients?
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After myocardial infarction, beta-blockers reduce heart rate, myocardial oxygen demand, and arrhythmias, thereby decreasing mortality and risk of reinfarction, while ACE inhibitors prevent ventricular remodeling, reduce progression to heart failure, and improve long-term survival; both are essential long-term therapies unless contraindicated, with monitoring for hypotension, bradycardia, cough, hyperkalemia, and renal dysfunction.