Beta-blockers are standardly used after a myocardial infarction, especially with a reduced ejection fraction. The study investigated whether beta-blockers also have an advantage in patients with a normal ejection fraction after a heart attack. The study included patients with acute myocardial infarction and normal left ventricular ejection fraction. The results showed that beta-blockers did not reduce the incidence of major cardiovascular events in these patients compared to the control group. The study did not confirm a significant beneficial effect of beta-blockers on overall mortality or hospitalization for heart disease in patients with a normal ejection fraction. The results suggest that the efficacy of beta-blockers after a heart attack may be limited in patients with impaired systolic heart function.