Beta-Blockers after Myocardial Infarction in Patients without Heart Failure

Beta-Blockers after Myocardial Infarction in Patients without Heart Failure

N Engl J Med . 2025 Nov 13;393(19):1901-1911. doi: 10.1056/NEJMoa2505985

Abstract

Background: The evidence supporting beta-blockertherapy after myocardial infarction was established before the introduction of modern coronary reperfusion therapy and secondary prevention strategies.

Methods: In an open-label, randomized trial withblinded end-point evaluation, conducted in Denmark and Norway, we assigned patients who had had a myocardial infarction and who had a left ventricular ejection fraction of at least 40%, in a 1:1 ratio, to receive long-term beta-blocker therapy within 14 days after the event or no beta-blocker therapy. The primary end point was a composite of death from any cause or major adverse cardiovascular events (new myocardial infarction, unplanned coronary revascularization, ischemic stroke, heart failure, or malignant ventriculararrhythmias).

Results: A total of 5574 patients underwent randomization and were included in the main analyses - 2783 in the beta-blocker group and 2791 in the no-beta-blocker group. After a median follow-up of 3.5 years (interquartile range, 2.2 to 4.6), a primary end-point event had occurred in 394 patients (14.2%) in the beta-blocker group and in 454 patients (16.3%) in the no-beta-blocker group (hazard ratio, 0.85; 95% confidence interval [CI], 0.75 to 0.98; P = 0.03). Death from any cause occurred in 4.2% of the patients in the beta-blocker group and in 4.4% of those in the no-beta-blocker group; myocardial infarction occurred in 5.0% and 6.7%, respectively (hazard ratio, 0.73; 95% CI, 0.59 to 0.92), unplanned coronary revascularization in 3.9% and 3.9%, ischemic stroke in 1.6%and 1.3%, heart failure in 1.5% and 1.9%, and malignant ventricular arrhythmias in 0.5% and 0.6%. No apparent differences in safety outcomes were observedbetween the groups.

Conclusions: Among patients with a myocardialinfarction and a left ventricular ejection fraction of at least 40%, beta-blocker therapy led to a lower risk of death or major adverse cardiovascular events than no beta-blocker therapy.

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