Beta-blockers (BBs) are the core of coronary artery disease (CAD) pharmacotherapy and demonstrated a well-established benefit in the treatment of acute myocardial infarction (MI). However, the prophylactic role of BBs to affect adverse outcomes in patients with stable CAD, especially among those without a pervious history of MI or left ventricular dysfunction, is not yet addressed. We aimed to determine the effects of beta-blockers on major adverse cardiovascular events (MACE) in patients with stable CAD without prior MI or left ventricular dysfunction. We searched PubMed, EMBASE, Web of Science, Scopus, Google Scholar, and Cochrane Controlled Trials Register for studies published from inception to March 31, 2021. Two researchers independently reviewed the database searches and selected eligible studies. A third reviewer was consulted whenever necessary. A total of 6 studies were included in the final analysis. BBs therapy did not reduce the risk of a MACE (HR, 1.05; 95% CI, 0.91 to 1.20), MI (HR, 1.13; 95% CI, 0.95 to 1.34), and cardiovascular death (HR, 0.95; 95% CI, 0.79 to 1.14). No statistically significant effect was observed between the participants on beta-blocker and control groups. In conclusion, our meta-analysis did not show the benefit of BBs in reducing MACE among patients with stable CAD without previous history of MI or left ventricular dysfunction.
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