Objective To investigate the effects of perioperative high loading dose of Atorvastatin treatment on lipoprotein associated phospholipase A2 (Lp-PLA2) and heart function in patients with acute ST-segment elevation myocardial infarction and type 2 diabetes who underwent emergency percutaneous coronary intervention (PCI).Methods Totally 83 cases with acute ST segment elevation myocardial infarction and type 2 diabetes who underwent emergency PCI from September 2012 and August 2014 were randomly divided into two groups.In control group (n=42)patients took Atorvastatin 20 mg daily before and after emergency PCI,and in intensive group (n=41) patients took atorvastatin 40 mg daily before and after emergency PCI.Each group was given the same basic treatment according to the guideline.Blood samples were obtained from all the patients before PCI and at 3,7 days after PCI,and levels of Lp-PLA2 and brain natriuretic peptide (BNP)were detected.And the left ventricular end diastolic diameter (LVEDD) and left ventricular ejection fraction (LVEF) were measured at 1 day and 1 month after PCI.Results The levels of Lp-PLA2 and BNP at 3 days after PCI were obviously increased in the two groups versus baseline [(297.8± 53.4) mg/L vs.(194.7±39.1) mg/L,(270.3±47.0) mag/L vs.(205.6±27.5) mg/L,both P＜0.05],and decreased in intensive versus control group [(270.3±47.0) mg/L vs.(297.8±53.4)mg/L and (353.8±76.3) mg/L vs.(375.4±57.0) mg/L,P＜0.05].And levels of Lp-PLA2 and BNP at 7 days after PCI were improved more in intensive than in control group [(227.2±33.3)mg/L vs.(249.3±42.3) mg/L,(206.0±48.2)mg/L vs.(267.6±50.8) mg/L,P＜0.05].There were no significant differences in LVEDD and LVEF between the two groups 1 day after PCI.Meanwhile,the LVEDD was decreased and the LVEF was increased in the two groups 1 month after PCI as compared with 1 day after PCI (both P＜0.05).Conclusions Perioperative high loading dose of Atorvastatin treatment may stabilize the plaques and improve heart function in acute stage in patients with acute ST-segment elevated myocardial infarction and type 2 diabetes after emergency PCI.