Beta-blocker and renin–angiotensin system inhibitor combination therapy in patients with acute myocardial infarction and prediabetes or diabetes who underwent successful implantation of newer-generation drug-eluting stents: A retrospective observational registry study

Long-term clinical outcomes in patients with acute myocardial infarction (AMI) and prediabetes or diabetes who received ß-blockers (BB) and renin–angiotensin system inhibitor (RASI) therapy after successful newer-generation drug-eluting stent (DES) implantation are limited. We compared the two-year clinical outcomes in such patients. A total of 9466 patients with AMI in the Korea AMI Registry were classified into six groups according to their glycemic status and presence or absence of BB + RASI therapy: Normoglycemia and BB + RASI users (n = 2217) or nonusers (n = 243), prediabetes and BB + RASI users (n = 2601) or nonusers (n = 306), and diabetes and BB + RASI users (n = 3682) or nonusers (n = 417). The primary endpoint was major adverse cardiac events (MACEs) defined as all-cause death, recurrent myocardial infarction (Re-MI), or any repeat revascularization, and the secondary endpoint was the cumulative incidence of hospitalization for heart failure (HHF). In patients with BB + RASI, despite similar primary and secondary clinical points between the prediabetes and diabetes groups, the cumulative incidence of Re-MI (adjusted hazard ratio: 1.660; 95% confidence interval: 1.000–2.755; p = 0.020) was higher in the diabetes group than in the prediabetes group. In all three different glycemic groups, BB + RASI users showed reduced MACEs, cardiac death, and HHF compared to those of BB + RASI nonusers. In this retrospective observational registry study, BB + RASI therapy showed comparable clinical outcomes except for Re-MI between prediabetes and diabetes in patients with AMI during a two-year follow-up period.