Are beta-blockers always beneficial after a myocardial infarction?

Prescribing beta-blocker therapy to a patient after a myocardial infarction (MI) is thought to reduce recurrent MI and mortality and has been a reportable quality measure for decades. A 2000 American Family Physician article on this topic, “Optimizing beta-blocker use after myocardial infarction,” implied that this intervention was settled science. Howe…