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  • Title: [Effect of combined beta-blocker and angiotensin-converting enzyme inhibitor treatment on 1-year survival after acute myocardial infarction: findings of the PRIAMHO-II registry].
    Author: Arós F, Loma-Osorio A, Vila J, López-Bescós L, Cuñat J, Rodríguez E, San José JM, Heras M, Marrugat J, Investigadores del PRIAMHO II.
    Journal: Rev Esp Cardiol; 2006 Apr; 59(4):313-20. PubMed ID: 16709383.
    Abstract:
    INTRODUCTION AND OBJECTIVES: Clinical trials have shown that combining beta-blockers and angiotensin-converting enzyme (ACE) inhibitors has an additive effect in reducing mortality in patients with left ventricular dysfunction following acute myocardial infarction. Whether this additive effect also occurs in unselected post-myocardial infarction patients is unknown. METHODS: In total, 5397 patients who were discharged from hospital after suffering an acute myocardial infarction were followed for 1 year. The primary endpoint was all-cause mortality. The effects of the medications on 1-year survival were analyzed using a Cox regression model, which included propensity scores for beta-blocker and ACE inhibitor use to take account of any potential imbalance in drug prescription rates. RESULTS: At hospital discharge, 55.9% of patients were receiving beta-blockers and 45.1%, ACE inhibitors. The 1-year mortality rate was 5.5%. Overall, combination of the two medications significantly reduced the 1-year mortality rate (hazard ratio [HR]=0.51; 95% confidence interval [IC], 0.32-0.82); P<.005) to a greater extent than ACE inhibitors alone (HR=0.78; 95% CI, 0.54-1.12; P=.2) or beta-blockers alone (HR=0.67; 95% CI, 0.43-1.05; P=.08). The same trend was also observed in low-risk patients without acute heart failure who had an ejection fraction > or =40%. CONCLUSIONS: In unselected post-myocardial infarction patients, combined prescription of beta-blockers and ACE inhibitors had an additive effect on the 1-year survival rate.
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