Association of β-Blocker Therapy at Discharge with Clinical Outcomes after Acute Coronary Syndrome in Patients without Heart Failure. (25th April 2020) - Chen, Yan
Abstract : Aim . To evaluate the clinical impact of β -blocker in patients with adequate left ventricular ejection function (LVEF) who underwent percutaneous coronary intervention (PCI) for acute coronary syndrome (ACS). Methods . A total of 10, 724 consecutive patients who underwent PCI throughout 2013 were prospectively enrolled in the study. Among these, we analyzed 5, 631 ACS patients who were discharged with LVEF ≥ 40 % . Patients were then compared according to the β -blocker prescription at discharge. Results . During a 2-year follow-up, no significant association was observed of β -blocker use with all-cause mortality (with β -blockers 47/5, 043 (0.9%) vs. without β -blocker use 8/588 (1.4%); hazard ratio (HR) 0.762, 95% confidence interval 0.36 to 1.64; P = 0.485 ), cardiac death, myocardial infarction (MI), or major adverse cardiovascular and cerebrovascular events. Subgroup analysis demonstrated that the β -blocker use at discharge reduced the 2-year mortality in patients with unstable angina (UA) (HR 0.42, 95% CI 0.19 to 0.94, P = 0.034 ). Landmark analysis at 1 year showed that patients with UA who were discharged with β -blockers had lower mortality (HR 0.17, 95% CI 0.04-0.65, P = 0.010 ) and cardiac death (HR 0.12, 95% CI 0.01-0.99, P = 0.049 ) than those discharged without β -blockers. However, the benefit was lost beyond 1 year. No differences in outcomes were recorded in the AMI or overall population. Conclusions . We present that β- blocker significantly lowers the rate of all-cause death up to 1 year, in UA patients who have undergone PCI and have adequate LVEF. Its role in patients with AMI also deserves further exploration.