Effects of prediabetes on long-term clinical outcomes of patients with acute myocardial infarction who underwent PCI using new-generation drug-eluting stents

Aims: We investigated the 2-year clinical outcomes of patients with acute myocardial infarction (AMI) and prediabetes after new-generation drug-eluting stents implantation. Methods: A total of 11,962 patients with AMI were classified into normoglycemia (group A; 3,080), prediabetes (group B; 3,709), and diabetes (group C; 5,173) groups. The primary outcomes were the patient-oriented composite outcomes (POCOs) defined as all-cause death, recurrent myocardial infarction (Re-MI), and any repeat revascularization. Secondary outcomes were the individual components of POCOs and stent thrombosis (ST). Results: POCOs in groups B and C were significantly higher than those in group A. Cardiac death (adjusted hazard ratio [aHR]: 1.957, 95% confidence interval [CI]: 1.126–3.402; p = 0.017) and any repeat revascularization (aHR: 1.597, 95% CI: 1.052–2.424; p = 0.028) rates were significantly higher in group B than in group A. Re-MI (aHR: 1.884, 95% CI: 1.201–2.954; p = 0.006) and death or MI (aHR: 1.438, 95% CI: 1.098–1.884; p = 0.008) were significantly higher in group C than in group B. Conclusions: In this study, prediabetes showed bad clinical outcomes post AMI. However, larger randomized controlled studies including ethnically diverse population are needed to confirm these harmful cardiovascular effects of prediabetes in the future.