Stress hyperglycemia during myocardial infarction (MI) is a predictor of worse prognosis at short and long term. From the mechanistic standpoint, hyperglycemia can attenuate thrombolysis, increase platelet aggregation, induce coronary vasoconstriction, reduce oxygen transport and prolong endothelial inflammation after MI. Consistently, observational data indicates that glucose normalization improves survival in hyperglycemic patients hospitalized with MI.