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目的探讨在首次医疗接触时给予不同剂量阿托伐他汀对接受直接经皮冠状动脉介入治疗(primary percutaneous coronary intervention,PPCI)的急性ST段抬高心肌梗死(ST-segment elevation myocardial infarction,STEMI)患者梗死相关区域心肌灌注水平的影响。方法纳入118例行PPCI的STEMI患者,在首次医疗接触时给予单次不同剂量阿托伐他汀,随机分为A组(给予阿托伐他汀80 mg,30例)、B组(给予阿托伐他汀40 mg,28例)、C组(给予阿托伐他汀20 mg,30例)和D组(给予安慰剂,30例),而后立即行冠状动脉造影及PPCI,术后测量并记录冠状动脉TIMI血流分级、心肌灌注分级(myocardial blush grade,MBG)、术后90 min心电图ST段回落程度(ST-segment resolution,STR)。结果四组患者梗死相关血管术前或术后的TIMI血流分级、MBG分别比较,差异均无统计学意义(均P>0.05)。四组患者术后90 min STR值分别为:A组(55.77±30.55)%,B组(53.66±28.14)%,C组(50.48±24.91)%,D组(42.03±30.63)%,组间比较,差异均无统计学意义(F=1.324,P=0.270),但A组至D组STR值总体均数呈逐渐降低趋势。结论对于接受PPCI治疗的STEMI患者,在首次医疗接触时给予负荷剂量的阿托伐他汀进行预处理未能改善PCI术后的冠状动脉血流及心肌灌注水平。
Objective To investigate the effect of different doses of atorvastatin on patients with acute ST-segment elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (PPCI) at first medical exposure Effect of Myocardial Infarction Level in Infarct Related Area. Methods A total of 118 STEMI patients undergoing PPCI were enrolled. A single dose of atorvastatin was given on the first medical contact and was randomly divided into group A (atorvastatin 80 mg, n = 30), group B (atorvastatin Statin 40 mg, n = 28), group C (atorvastatin 20 mg, n = 30) and group D (placebo, n = 30). Immediate coronary angiography and PPCI were performed. Coronary arteries TIMI grade, myocardial blush grade (MBG) and ST-segment resolution (STR) 90 minutes after operation. Results There was no significant difference in TIMI flow grade and MBG between before and after infarction-related artery in four groups (all P> 0.05). The STR values of the four groups at 90 min after operation were 55.77 ± 30.55% in group A, 53.66 ± 28.14% in group B, 50.48 ± 24.91% in group C and 42.03 ± 30.63% in group D, There was no significant difference between the two groups (F = 1.324, P = 0.270). However, the overall STR values of group A to group D decreased gradually. Conclusions Pretreatment with a loading dose of atorvastatin on first medical exposure in STEMI patients undergoing PPCI failed to improve coronary blood flow and myocardial perfusion after PCI.