Fifty years ago, many people who survived a heart attack were left with significant, permanent heart damage that led to heart failure. For many of these individuals, beta-blockers were lifesavers. Patients were routinely started on the drug, which lowers levels of epinephrine, a type of adrenaline that increases the risk of death; reduces the size of the heart, helping it pump more effectively; and makes the heart beat more slowly, lowering the risk of arrhythmias and hospitalizations.
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