心肌缺血后处理对急性ST段抬高型心肌梗死再灌注损伤的保护作用

目的 探讨缺血后处理对ST段抬高型心肌梗死(STEMI)再灌注损伤的保护作用.方法 2006年10月至2009年1月在北华大学附属医院心内科住院并在12 h内行直接冠状动脉介入治疗(PCI)的STEMI患者64例,分为对照组(34例)及缺血后处理组(30例).对照组给予单纯再灌注治疗,缺血后处理组采用再灌注30 s/再缺血30 s,交替3次后再持续灌注的方法.比较两组再灌注心律失常的发生率、发病72 h的CK和CK-MB峰值及72 h的CK值动态变化、冠状动脉血流速度(CTFC)、室壁运动计分(WMSI)、左心室射血分数(LVEF)、QRS计分法测定心肌梗死面积(QRS-MIS)、心肌呈色分级(MBG)的变化.结果 对照组和缺血后处理组再灌注心律失常频发室性早搏发生率分别为52.9%(18/34)和26.7%(8/30,P＜0.05),短阵室性心动过速的发生率分别为58.8%(20/34)和23.3%(7/30,P＜0.05),CK峰值分别为(1732±480)U/L和(1162±548)U/L(P＜0.01),CK-MB峰值分别为(280±99)U/L和(165±70)U/L(P＜0.01),CTFC分别为(26.97±3.42)帧和(22.23±3.81)帧(P＜0.05),WMSI分别为1.82±0.83和1.27±0.52(P＜0.05),LVEF分别为0.47 ±0.10和0.55±0.08(P＜0.05),心肌梗死面积分别为(14.65±6.88)%和(10.60±4.97)%(P＜0.05),MBG分别为1.47±0.61和2.27±0.64(P＜0.05).结论 心肌缺血后处理能显著减轻STEMI患者心肌再灌注损伤,有显著的心肌保护作用.

Abstract：

Objective To observe the effect of ischemia postconditioning during the first minutes of reperfusion for the myocardial reperfusion injury in ST-segment elevation acute myocardial infarction (STEMI)patients undergoing emergency percutaneeus coronary intervention(PCI). Methods STEMI patients undergoing emergency PCI in affiliated hospital of Beihua University between October 2006 and January 2009 were randomly divided into two groups: the control group(n = 34)without any intervention after PTCA, and the postconditioning group(n = 30)with ischemia postconditioning within first minutes of reflow by 3 episodes of 30-second inflation and 30-second deflation with the angioplasty balloon. Reperfusion arrhythmias, CK and CKMB, corrected TIMI frame count(CTFC), wall motion score index(WMSI)and left ventricular ejection fraction(LVEF)by echocardiography were compared between the two groups. MI areas were evaluated with the ECG-54 criteria/32 system and myocardial blush grade(MBG)was measured. Results The incidence of reperfusion arrhythmias-frequent ventricular premature(26. 7% vs.52. 9%)and short array ventricular tachycardia beat(23.3% vs. 58. 8%)as well as values of peaks CK (l162±548)U/L vs.(1732±480)U/L, P＜0. 01], CKMB(165±70)U/L vs.(280±99)U/L,P＜0. 01],CTFC(22.23 ±3.81 vs. 26.97 ±3.42), WMSI(1.27 ±0.52 vs. 1.82 ±0.83),and infarction areas determined by ECG methods(10. 60% ±4. 97% vs. 14. 65% ±6. 88%, all P ＜0. 05)were all significantly lower in the postconditioning group than in control group while LVEF(0. 55 ± 0. 08 vs.0. 47 ±0. 10)and MBG(2. 27 ± 0. 64 vs. 1.47 ± 0. 61, all P ＜ 0. 05)were signiticantly higher in the postconditioning group than in control group. Conclusions Ischemia postconditioning can significantly reduce myocardial reperfusion injury in patients with STEMI.

Protective effect of ischemia postconditioning on reperfusion injury in patients with ST-segment elevation acute myocardial infarction

Objective To observe the effect of ischemia postconditioning during the first minutes of reperfusion for the myocardial reperfusion injury in ST-segment elevation acute myocardial infarction (STEMI)patients undergoing emergency percutaneeus coronary intervention(PCI). Methods STEMI patients undergoing emergency PCI in affiliated hospital of Beihua University between October 2006 and January 2009 were randomly divided into two groups: the control group(n = 34)without any intervention after PTCA, and the postconditioning group(n = 30)with ischemia postconditioning within first minutes of reflow by 3 episodes of 30-second inflation and 30-second deflation with the angioplasty balloon. Reperfusion arrhythmias, CK and CKMB, corrected TIMI frame count(CTFC), wall motion score index(WMSI)and left ventricular ejection fraction(LVEF)by echocardiography were compared between the two groups. MI areas were evaluated with the ECG-54 criteria/32 system and myocardial blush grade(MBG)was measured. Results The incidence of reperfusion arrhythmias-frequent ventricular premature(26. 7% vs.52. 9%)and short array ventricular tachycardia beat(23.3% vs. 58. 8%)as well as values of peaks CK (l162±548)U/L vs.(1732±480)U/L, P＜0. 01], CKMB(165±70)U/L vs.(280±99)U/L,P＜0. 01],CTFC(22.23 ±3.81 vs. 26.97 ±3.42), WMSI(1.27 ±0.52 vs. 1.82 ±0.83),and infarction areas determined by ECG methods(10. 60% ±4. 97% vs. 14. 65% ±6. 88%, all P ＜0. 05)were all significantly lower in the postconditioning group than in control group while LVEF(0. 55 ± 0. 08 vs.0. 47 ±0. 10)and MBG(2. 27 ± 0. 64 vs. 1.47 ± 0. 61, all P ＜ 0. 05)were signiticantly higher in the postconditioning group than in control group. Conclusions Ischemia postconditioning can significantly reduce myocardial reperfusion injury in patients with STEMI.