EDITORIAL Does using HbA1c inform diagnosis of diabetes in patients with coronary artery disease?

This editorial refers to ‘Screening for dysglycaemia in patients with coronary artery disease as reflected by fasting glucose, oral glucose tolerance test, and HbA1c: a report from EUROASPIRE IV—a survey from the European Society of Cardiology’, by V. Gyberg et al. on page doi:10.1093/eurheartj/ehv008 In recent years, using easy, quality-certified, and accurate glycated haemoglobin (HbA1c)measurements hasbecomeagloballyaccepted, if not recommended part of our everyday practical armamentarium in diagnosing diabetes mellitus (DM), although controversy continues over its precise position in the diagnostic algorithm.1–4 On the other hand, the very high and, in fact, increasing number of both diagnosed and undiagnosed cases of DM (besides other established cardiovascu-lar risk factors) in patientswithcoronary arterydisease (CAD)has also emerged as a worldwide phenomenon, and prompted the first join