Beta-bloccanti dopo infarto miocardico con funzione di espulsione preservata e leggermente ridotta: una meta-analisi con analisi sequenziale di prova.

AIMS: We aimed to evaluate the efficacy of β-blockers after myocardial infarction (MI) across left ventricular ejection fraction (LVEF) strata and to assess the conclusiveness of the available evidence using trial sequential analysis (TSA). METHODS: PubMed, Embase and ClinicalTrials.gov were searched for randomized controlled trials (RCTs) evaluating β-blockers in post-MI patients with LVEF ≥ 40%. A time-to-event meta-analysis was performed for the primary composite (as defined by each trial) and for individual endpoints. The Mantel-Haenszel method was used to pool risk ratios (RR) for major adverse cardiovascular events (MACE; death, MI or heart failure), including LVEF-stratified analyses