Association between Glycemic Gap at Admission and In-Hospital Outcome in Patients with Diabetes with Acute Myocardial Infarction

Background: Acute hyperglycemia predicts adverse outcomes in patients with acute myocardial infarction (AMI), but it has a major disadvantage because the association is diminished in patients with diabetes mellitus (DM). Recent studies introduced a more accurate predictor, the glycemic gap (the difference between admission blood glucose and the estimated average glucose), that could anticipate adverse outcomes in patients with diabetes with AMI. Aims: This study aimed to determine the association between glycemic gap and clinical outcome in diabetic patients presenting with AMI to a tertiary hospital in Bangladesh. Methods: Two hundred twenty diabetic patients hospitalized with AMI were included in this study from the Department of Cardiology of Chittagong Medical College Hospital from March 2023 to February 2024. Admission blood glucose and HbA1c were measured, and the glycemic gap was calculated. Patients were prospectively followed during their hospital stay to obtain data regarding major adverse cardiac events (MACEs). Results: The mean (±SD) age of the patients was 56.5 (±10.1) years and 63.6% of them were male. MACEs included in-hospital death, cardiac arrest, cardiogen