北京大学学报(医学版) ›› 2014, Vol. 46 ›› Issue (6): 838-843.

• 论著 • 上一篇    下一篇

远隔缺血后适应在急性ST段抬高型心肌梗死直接经皮冠状动脉介入治疗术中的心肌保护作用

王宁1,2,王贵松1△,于海奕1,米琳1,郭丽君1,高炜1   

  1. (1. 北京大学第三医院心内科,卫生部心血管分子生物学与调节肽重点实验室,分子心血管学教育部重点实验室,北京100191; 2.北京大学国际医院心内科,北京102206)
  • 出版日期:2014-12-18 发布日期:2014-12-18

Myocardial protection of remote ischemic postconditioning during primary percutaneous coronary intervention in patients with acute ST-segment elevation myocardial infarction

WANG Ning1,2,WANG Guisong1△,YU Haiyi1,MI Lin1,GUO Lijun1,GAO Wei1   

  1. WANG Ning1,2,WANG Gui-song1△,YU Hai-yi1,MI Lin1,GUO Li-jun1,GAO Wei1
  • Online:2014-12-18 Published:2014-12-18

摘要: 目的:评价肢体远隔缺血后适应在急性ST段抬高型心肌梗死(ST-segment elevation myocardial infarction,STEMI)患者行直接经皮冠状动脉介入治疗(percutaneous coronary intervention,PCI)术中的心肌保护作用。方法:选择2014年1月至4月在北京大学第三医院心内科接受直接PCI治疗的急性STEMI患者46例,随机分为远隔缺血后适应组(n=23)和常规PCI组即对照组(n=23)。远隔缺血后适应组在PCI术前于左下肢绑缚无创血压袖带,术中第一次球囊扩张或血栓抽吸而恢复血流后1 min内开始充气加压阻断左下肢血流,充气5 min,放气 5 min,交替3个循环。比较两组酶学心肌梗死面积、术后1 h ST段完全回落率、梗死相关动脉(infarct-related artery, IRA)、校正TIMI(thrombolysis in myocardial infarction)帧数(corrected TIMI frame count, CTFC) 的差异以及直接PCI术前、术后血浆丙二醛(malondialdehyde,MDA)、内皮素-1(endothelin-1,ET-1)、肿瘤坏死因子α(tumor necrosis factor α,TNFα)水平的变化。结果:两组酶学心肌梗死面积比较差异无统计学意义(P>0.05);远隔缺血后适应组PCI术后1 h ST段完全回落率高于对照组(60.9% vs. 30.4%, P=0.04);PCI术后CTFC在远隔缺血后适应组有降低趋势(28±11 vs.33±11,P=0.10),在前壁STEMI患者远隔缺血后适应组显著低于对照组(25±9 vs.39±10,P=0.01)。远隔缺血后适应组血浆MDA、ET-1、TNFα水平于直接PCI术后不同时间点显著低于对照组(P<0.05)。结论:肢体远隔缺血后适应可改善急性STEMI患者直接PCI术后心肌组织灌注水平,减轻缺血再灌注损伤,其机制可能与减轻氧化应激、保护内皮功能、抑制炎症反应等因素有关。

关键词: 缺血后适应, 心肌梗死, 经皮冠状动脉介入治疗, 心肌再灌注损伤

Abstract: To evaluate the cardioprotection of remote ischemic postconditioning (RIPostC) in patients with acute ST-segment elevation myocardial infarction (STEMI) who underwent primary percutaneous coronary intervention (PCI).Methods:Forty-six STEMI patients undergoing primary PCI at Peking University Third Hospital from January to April 2014 were randomized to RIPostC group (n=23) and control group (n=23).The RIPostC protocol was started within 1 min after reflow by thrombus aspiration or balloon inflation and consisted of 3 cycles of 5 min/5 min ischemia/reperfusion by cuff inflation/deflation of the lower left limb. The enzymatic infarct size, rate of complete ST segment resolution, corrected thrombolysis in myocardial infarction (TIMI) frame count (CTFC) in infarct-related artery (IRA) and plasma levels of malondialdehyde(MDA), endothelin-1(ET-1), tumor necrosis factor α (TNFα) of the two groups were compared. Results:There was no significant difference in enzymatic infarct size between the two groups (P>0.05). The rate of complete ST-segment resolution was significantly higher in RIPostC group than in control group (60.9%vs. 30.4%,P=0.04). There was a trend toward lower CTFC in RIPostC group than that in control group, but the difference was not statistically significant(28 ± 11 vs. 33 ± 11, P = 0.10). However, in the subgroup of anterior wall myocardial infarction CTFC in RIPostC group was significantly lower, compared with control group (25±9 vs. 39±10, P=0.01).There were lower plasma levels of MDA,ET-1,TNFα in RIPostC group than in control group at different time points after primary PCI (P<0.05). Conclusion:In STEMI patients undergoing primary PCI, RIPostC may improve myocardial perfusion and attenuate ischemia reperfusion injury with the underlying mechanisms involving reduction of oxidative stress, protection of endothelial function and inhibition of inflammatory response.

Key words: Ischemic postconditioning, Myocardial infarction, Percutaneous coronary intervention, Myocardial reperfusion injury

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