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Recent studies have shown that acute blood glucose elevation in patients with ST-segment elevation myocardial infarction (STEMI) suggests a poor prognosis.To investigate the effect of fasting blood glucose (FBG) on the risk of heart failure (HF) and left ventricular systolic dysfunction (LVSD) in non-diabetic patients undergoing primary percutaneous coronary intervention (PCI) for acute STEMI,we retrospectively recruited consecutive non-diabetic patients who underwent primary PCI for STEMI in our hospital from February 2003 to March 2015.The patients were divided into two groups according to the FBG level.A total of 623 patients were recruited with an age of 61.3 ± 12.9 years,of whom 514 (82.5％) were male.The HF risk (odds ratio 3.401,95％ confidence interval (CI) 2.144-5.395,P ＜ 0.001) was significantly increased in patients with elevated FBG than those with normal FBG.Elevated FBG was also independently related to LVSD (β 1.513,95％CI 1.282-1.785,P ＜ 0.001) in a multiple logistics regression analysis.In conclusion,elevated FBG was independently associated with 30-day HF and LVSD risk in non-diabetic patients undergoing primary PCI for STEMI.