急性心肌梗死患者不同梗死部位与脑利钠肽的关系探讨

目的观察急性心肌梗死（AMI）患者不同梗死部位血浆脑利钠肽（BNP）水平,探讨二者之间的关系。方法测定96例AMI患者（AMI组）及30例正常人（对照组）血浆BNP、左室舒张末期横径（LVEDD）、左室射血分数（LVEF）等指标,分析BNP与AMI不同梗死部位相关性。结果AMI组血浆BNP、LVEDD均显著高于对照组,LVEF显著低于对照组（P均〈0.01）;前壁梗死者较非前壁梗死者BNP、LVEDD显著升高而LVEF显著降低（P均〈0.05）;BNP水平与LVEDD呈正相关（r=0.687,P〈0.01）,与LVEF呈负相关（r=-0.639,P〈0.01）。结论BNP水平与AMI患者不同梗死部位密切相关,对AMI患者的心功能及预后判断有重要意义。     

急性心肌梗死窦性心律震荡和心率变异性的研究

目的探讨急性心肌梗死(AMI)伴室性期前收缩患者窦性心律震荡和心率变异性(HRV)的变化和临床意义。方法随机选取本院AMI合并室性期前收缩的患者58例(心梗组)和体检健康者52例(对照组)。收集所有受检者24h平均心率、R-R间期标准差、窦性心律震荡的初始值(TO)、窦性心律震荡的斜率(TS)、肌钙蛋白I(TNI)峰值、左室射血分数(LVEF)。比较两组24h平均心率、R-R间期标准差、TO、TS。并研究窦性心律震荡和HRV指标与TNI峰值和LVEF的相关性。结果心梗组的心律震荡和HRV指标弱于对照组,差异有统计学意义(P<0.05)。心梗组的R-R间期标准差与TNI峰值呈负相关(r=-0.52,P<0.01),与LVEF呈正相关(r=0.25,P<0.05)。TO与TNI峰值呈正相关(r=0.68,P<0.01),TO与LVEF呈负相关(r=-0.49,P<0.01)。TS与TNI峰值呈负相关(r=-0.79,P<0.01),TS与LVEF呈正相关(r=0.55,P<0.01)。死亡组的R-R间期标准差、TS低于存活组,TO高于存活组,差异有统计学意义(P<0.05)。结论窦性心律震荡和HRV减弱是反映AMI严重程度和预后的有用指标。     

急性心肌梗死患者心脏胶原代谢和左室重构与心功能的关系

目的观察急性心肌梗死（AMI）患者血清Ⅰ型前胶原羧基端肽（PⅠCP）和Ⅲ型前胶原（PCⅢ）水平,探讨AMI后心脏胶原代谢与左室重构及心功能的变化规律。方法应用酶联免疫法检测AMI患者发病后1周和3月的血清PⅠCP和PCⅢ含量,超声心动图同期检测左室舒张末期内径（LVEDD）、左室舒张末期容积（LVEDV）、左室射血分数（LVEF）和二尖瓣血流舒张早期流速（VE）与心房收缩期流速（VA）的比值。结果AMI后3月患者血清PⅠCP和发病后各时点血清PCⅢ均高于对照组,而AMI后3月患者PⅠCP高于AMI后1周。与正常对照组比较,AMI后各时点的LVEDD、LVEDV均增高,而LVEF和VE/VA比值降低。AMI发病后1周和3月PCⅢ分别与LVEDD和LVEDV呈正相关,与LVEF呈负相关;AMI发病后1周PⅠCP分别与LVEDD和LVEDV呈正相关,AMI发病后3月PⅠCP与LVEF呈负相关。结论AMI患者心脏胶原代谢活跃,血清PⅠCP和PCⅢ含量明显持续升高,参与左室重构,与AMI后心功能不全密切相关。     

长链非编码RNA MEG3在心肌梗死患者血清中的表达及意义

【】目的 探讨检测长链非编码RNA MEG3(MEG3)在急性心肌梗死(AMI) 患者早期血清中的表达及其临床意义。方法 采用实时荧光定量PCR(Real time PCR )检测我院收治的48例AIM 患者发病后不同时间点及30例正常对照组人员血清MEG3的表达水平, 分析其与血清肌酸激酶同工酶(CK-MB )和心肌肌钙蛋白(CTnI)表达水平的相关性。结果 正常人血清MEG3维持在相对较低的水平。AMI发作后1h患者血清MEG3的表达水平明显升高(P<0.05),AMI发作后3h患者血清MEG3即可达到峰值。相关分析发现血清MEG3的表达与CK-MB 和CTnI呈正相关关系(CK-MB r= 0.684, P < 0.001,CTnI ,r= 0.721, P < 0.001)。结论 AMI 患者早期血清MEG3表达显著升高, 可能是潜在的AIM早期血清标志物。     

急性心肌梗死患者血清促红细胞生成素变化及其临床意义

目的探讨急性心肌梗死（AMI）患者血清中促红细胞生成素（EPO）的变化与临床意义。方法选取AMI患者40例,不稳定性心绞痛（UA）患者22例进行血清EPO含量、血清心肌型肌酸激酶同工酶（CK—MB）和外周血中血液成分变化检测,另选20例健康个体作对照。结果AMI组与UA组的血清EPO均显著高于对照组,且AMI组明显高于UA组;AMI组血清CK-MB水平显著高于UA组和对照组;AMI组血清EPO水平和CK-MB峰值水平呈负相关（r=-0．35,P〈0．05）。结论AMI患者EPO存在应激反应性升高,而且与梗死面积呈负相关。     

心肌肌钙蛋白T与急性心肌梗死患者左心室功能的关系

目的探讨急性心肌梗死（AMI）后血清心肌肌钙蛋白T（cTnT）峰值与心功能、左室射血分数（LVEF）的关系。方法分别测定了24例急性前壁心肌梗死患者的cTnT、心功能、LVEF、EDV、ESV。结果所有前壁AMI患者的cTnT峰值与心功能成等级相关，与LVEF成负相关，与EDV、ESV成正相关；随访6个月，3例死于心衰的病人cTnT峰值均＞15μg／L（平均为17．2±1．9）μg／L），LVEF值下降者的cTnT峰值在8～15μg／L之间，LVEF值升高者的cTnT峰值均＜μg／L。结论前壁AMI后cTnT峰值越高，心功能越差，预后也越差。     

急性冠脉综合征患者血浆脑钠肽水平的变化及其临床意义

目的 探讨急性冠脉综合征（不稳定型心绞痛和急性心肌梗死）血浆脑钠肽（BNP）水平与冠状动脉病变（CAG）严重程度及心功能（左室射血分数LVEF）的关系.方法 以随机抽取的不稳定型心绞痛（UAP）患者89 例和急性心肌梗死（AMI）患者91例作为研究对象,测定其血浆BNP水平,同时检测CAG程度和LVEF,分析血浆BNP水平与CAG程度及心功能之间的相关性.结果 AMI组的血浆BNP水平明显高于UAP组.随着冠状动脉病变支数的增加血浆BNP水平逐渐增高,两者呈正相关（r=0.813,P〈0.01）;随着左室射血分数的降低,血浆BNP水平逐渐升高,两者呈负相关（r=-0.846,P〈0.01）.结论 UAP/AMI患者在发病48 h内血浆BNP水平越高其冠脉病变程度越重,心功能越差.多元逐步回归显示,血浆BNP水平对UAP/AMI患者在发病48 h内的冠脉病变程度及心功能有独立的预测价值.     

急性心肌梗死患者血清人软骨糖蛋白39、可溶性肿瘤坏死因子受体1水平与心功能及预后的相关性

目的分析急性心肌梗死(AMI)患者血清人软骨糖蛋白39(YKL-40)、可溶性肿瘤坏死因子受体1(sTNFR1)水平与心功能及预后之间的关系。方法选取2016年3月—2018年10月在河北北方学院附属第一医院就诊的77例AMI患者为研究对象(AMI组),选取同期在该院健康体检的77例为对照组。对AMI患者出院后随访,记录患者预后情况,随访时间为24个月。超声心动图测定两组心功能参数左心室射血分数(LVEF)、左心室舒张末期内径(LVEDD)、左心室后壁厚度(LVPWT);酶联免疫吸附法测定血清YKL-40、sTNFR1水平;Pearson法分析血清YKL-40、sTNFR1水平与AMI患者心功能参数的相关性;分析血清YKL-40、sTNFR1水平与AMI患者预后不良的关系;COX回归分析影响AMI患者预后不良的危险因素。结果与对照组比较,AMI组血清YKL-40、sTNFR1水平和LVEDD、LVPWT显著升高,LVEF显著降低(P<0.05)。随着AMI患者心功能分级的升高,血清YKL-40、sTNFR1水平逐渐升高(P<0.05)。AMI患者血清YKL-40、sTNFR1水平与LVEF呈负相关,与LVEDD、LVPWT呈正相关(P<0.05)。AMI患者YKL-40高水平组、sTNFR1高水平组的预后不良发生率均高于低水平组(P<0.05)。多因素COX分析表明,心肌梗死类型、梗死部位与血清YKL-40、sTNFR1水平是影响AMI患者预后不良的危险因素(P<0.05)。结论AMI患者血清YKL-40、sTNFR1水平与心功能和预后不良的发生相关,可能是评估AMI患者预后的潜在生物标志物。     

心力衰竭患者脑钠素水平与心功能的关系

【目的】研究慢性心力衰竭患者血清脑钠素(BNP)浓度与心功能的关系。方法用酶联免疫吸附法(ELISA)测定62例慢性心力衰竭患者及20名健康对照组血清BNP浓度,采用多普勒超声心动图测定左室射血分数(LVEF)、左室短轴缩短率(FS)、左室舒张末内径(LVEDD),观察BNP水平与LVEF、FS、LVEDD的相关性。结果心衰组血清BNP浓度较对照组明显增高(P<0.01),各心衰组BNP水平差异有统计学意义,且BNP水平随NYHA分级升高而升高。BNP水平与LVEF及FS呈负相关(r=-0.62,r=-0.59,P<0.01),与LVEDD呈正相关(r=0.67,P<0.01)。结论血清CNP浓度可作为反映心功能状态的指标,并与心脏结构有关。     

心脏彩超参数联合血清NT-proBNP预测AMI患者PCI术后并发心力衰竭的价值分析

目的 探讨心脏彩超参数联合血清N?端脑利钠肽前体（NT-proBNP）预测急性心肌梗死（AMI）患者经皮冠状动脉介入（PCI）治疗后并发心力衰竭的价值。 方法 选取2018年3月～2020年1月重庆市江津区中心医院收治的行急诊PCI术治疗的169例AMI患者为研究组,另选取同期体检健康者144例为对照组,均行心脏彩超检查及血清NT-proBNP水平测定。术后随访6个月,根据心力衰竭并发情况将研究组患者分为并发心衰组与未并发心衰组,采用多因素Logistic回归性分析法分析术后24 h内的心脏彩超参数、血清NT-proBNP水平与AMI患者PCI术后并发心力衰竭的关系,采用受试者工作特征（ROC）曲线分析术后24 h内心脏彩超参数联合血清NT-proBNP水平对AMI患者PCI术后并发心力衰竭的预测价值。 结果 研究组左室舒张末内径（LVEDD）、左室收缩末期内径（LVESD）、Tei指数均明显大于对照组（P<0.01）,左室射血分数（LVEF）、二尖瓣舒张早期血流峰值速度（E峰）与舒张晚期血流峰值速度（A峰）比值（E/A）均明显小于对照组（P<0.01）,血清NT-proBNP水平明显高于对照组（P<0.01）;随访6个月,研究组患者心力衰竭并发率为18.34%（31/169）;并发组（n = 31）与未并发组（n = 138）比较,年龄≥60岁（P<0.05）、多个梗死部位（P<0.01）、高血压（P<0.01）、糖尿病（P<0.05）、高脂血症（P<0.05）、PCI术后慢/无复流的占比均高于未并发组（P<0.01）,发病至入院时间长于未并发组（P<0.01）,冠脉病变支数、LVEDD、LVESD、Tei指数均大于未并发组（P<0.01）,LVEF、E/A均小于未并发组（P<0.01）,冠脉病变Gensini评分、cTnT、CK-MB、SBP、DBP、NT-proBNP水平高于未并发组（P<0.01）,以上指标均是AMI患者PCI术后6个月并发心力衰竭的影响因素;经ROC曲线分析,PCI术后24 h内LVEDD、LVESD、LVEF、E/A、Tei指数单项及联合预测AMI患者PCI术后并发心力衰竭的灵敏度分别为83.87%、80.65%、80.65%、80.65%、83.87%、80.65%,特异度分别为75.36%、76.09%、78.26%、76.81%、76.09%、94.20%;PCI术后24 h内血清NT-proBNP水平及其与整体心脏彩超参数二者联合预测AMI患者PCI术后并发心力衰竭的灵敏度分别为83.87%和96.77%,特异度分别为91.30%和91.30%。 结论 AMI患者PCI术后24 h内心脏彩超参数LVEDD、LVESD、Tei指数增大而LVEF、E/A减少,且血清NT-proBNP水平异常升高,以上各指标均对AMI患者PCI术后心力衰竭的发生具有一定的影响作用,并对并发心力衰竭具有一定的预测价值,但以整体心脏彩超参数与血清NT-proBNP水平联合预测时的价值更具临床意义,另患者年龄、发病至入院时间、冠脉病变支数、冠脉病变Gensini评分、cTnT、CK-MB、血压、梗死部位、高血压、糖尿病、高脂血症、PCI术后复流情况亦是AMI患者PCI术后并发心力衰竭的危险因素。     

Prognostic value of non-sustained ventricular tachycardias after acute myocardial infarction in the thrombolytic era: importance of combination with frequent ventricular premature beats

PURPOSE: of this study was to re-evaluate the association between ventricular arrhythmias and long-term mortality after acute myocardial infarction (AMI) in the thrombolytic era. METHODS: MITRA (maximal individual therapy in patients with AMI) is a multicenter registry of 54 hospitals in Germany investigating patients with AMI. RESULTS: 2420 patients received Holter ECG. Positive Holter ECG was defined: > or =10 ventricular premature beats (VPB)/h, or > or =4 couplets/d, or > or =1 non-sustained ventricular tachycardia (nsusVT)/d, or their combination. Mortality rates (median 17 months) were 6.5% without ventricular arrhythmias, with > or =10 VPB/h 15.2% and with the combination of > or =10 VPB/h plus either > or =4 couplets/d or > or =1 nsusVT/d 23.4%. In multivariate analysis, none of the ventricular arrhythmias alone correlated with mortality. There was a significant association between mortality and the combination of > or =10 VPB/h plus > or =4 couplets/d (OR 2.3) or > or =10 VPB/h plus > or =1 nsusVT/d (OR 2.8). CONCLUSION: Non-sustained VTs are only associated with poor prognosis if combined with frequent VPBs.     

Activated toll-like receptor 4 in monocytes is associated with heart failure after acute myocardial infarction

Peripheral monocytosis may affect the development of heart failure (HF) after acute myocardial infarction (AMI). Activated toll-like receptor (TLR) 4 in monocytes plays an important role in the synthesis of proinflammatory cytokines. We examined TLR4 expression in monocytes, which may be a possible source of proinflammatory cytokines in AMI. Sixty-five patients with AMI and 20 healthy subjects (HS) were studied. Monocytes were isolated from peripheral blood on days 1 and 14 after the onset of AMI. TLR4 levels in monocytes were measured using real-time RT-PCR and flow cytometry. Generation capacity was evaluated by TLR4 levels and cytokine concentrations in the culture medium with lipopolysaccharide (LPS) stimulation. On day 1 after onset, baseline levels of TLR4 and plasma proinflammatory cytokines, notably IL-6 and TNF-alpha, were higher in AMI patients than in HS. These levels remained elevated in AMI patients 14 days after onset. Generation capacities of TLR4 and proinflammatory cytokines (IL-2, IL-6, IL-8, IL-10, GM-CSF and TNF-alpha) were increased in AMI patients compared to HS. LPS-stimulated TLR4 levels were positively correlated with IL-6 and TNF-alpha levels in AMI patients. Baseline TLR4 levels and plasma proinflammatory cytokine (IL-6, GM-CSF and TNF-alpha) levels were higher in AMI patients with HF (n = 22) than in those without HF. Generation capacities of TLR4 and proinflammatory cytokines (IL-6, GM-CSF and TNF-alpha) were greater in AMI patients with HF than in those without HF. Activation of TLR4 through a myocytic inflammatory reaction is associated with HF after AMI. These observations suggest that TLR4 signaling in monocytes may play a role in the development of HF after AMI.     

Intravenous nicorandil can reduce the occurrence of ventricular fibrillation and QT dispersion in patients with successful coronary angioplasty in acute myocardial infarction

BACKGROUND: Because nicorandil, a potassium channel opener, has a cardioprotective effect and attenuates reperfusion injury in patients with acute myocardial infarction (AMI), intravenous nicorandil should reduce arrhythmic mortality and QT dispersion in patients with AMI. OBJECTIVES: The purpose of this study was to evaluate whether intravenous nicorandil reduces the occurrence of ventricular fibrillation and QT dispersion in patients with successful coronary angioplasty in AMI. METHODS: A historical cohort study on the effect of nicorandil on ventricular fibrillation and QT dispersion was conducted. Eighty-three patients with AMI who underwent successful percutaneous transluminal coronary angioplasty (PTCA) were enrolled. The patients were divided into two groups: nicorandil (n=46) and control group (n=37). Nicorandil was injected at 4 mg/h continuously from admission to 48 h after PTCA in the nicorandil group. QT dispersion was measured before, immediately after, 24 h after and 48 h after PTCA. RESULTS: Ventricular fibrillation was observed in three patients in the control group, but none was observed in the nicorandil group. QT dispersion in the nicorandil group was shorter than that in the control group 48 h after PTCA (QT dispersion was 23.2+/-16.1 ms and 33.4+/-24.0 ms, respectively, P<0.05). There was a significant difference between the two groups in time course after the onset of AMI (P<0.05). CONCLUSIONS: Because intravenous nicorandil reduces the occurrence of ventricular fibrillation and QT dispersion in patients with successful coronary angioplasty in AMI, it would prevent the occurrence of cardiac events after successful PTCA for AMI.     

急性心肌梗死恢复期PTCA及支架置入术对QT离散度的影响

目的　观察急性心肌梗死 (AMI)恢复期 (2～ 4周 )行经皮冠状动脉腔内成形术 (PTCA)及支架置入术对QT离散度 (QTd)的影响。方法　选择 5 7例AMI恢复期的患者 ,分别记录PTCA及支架置入术前 1d ,术后 1h的 12导联同步心电图 ,测量QTd及校正的QTd(QTcd) ,并与 86例同期行冠状动脉造影结果正常者进行对照。结果　AMI组行PTCA及支架置入术前最大QT间期 (QTmax) ,最小QT间期 (QTmin) ,QTd及QTcd均较对照组明显增大 ,差异有显著性。前壁与下壁AMI之间上述指标差异无显著性。成功的PTCA及支架置入术后QTmax,QTmin,QTd及QTcd比术前明显缩短 ,两者相比差异有显著性。而单纯行冠状动脉造影对QT离散度无明显影响。结论　AMI患者QTd及QTcd显著高于正常人 ,而AMI恢复期成功的PTCA及支架置入术可使增加的QTd及QTcd显著缩短 ,从而减低AMI后恶性心律失常和心源性猝死的发生率 ,改善患者的远期预后。     

急性心肌梗死恢复期介入治疗对QT离散度的影响

目的探讨急性心肌梗死(AMI)恢复期(2～4周)介入治疗对QT离散度(QTd)的影响。方法选定76例AMI恢复期患者,对照分析行经皮冠状动脉腔内成形术(PTCA)及冠状动脉内支架置入术术前1d和术后1h的标准12导联同步心电图,测量QTd及校正的QT离散度(QTcd),并与53例同期行冠状动脉造影结果正常者(对照组)进行比较。结果AMI组介入治疗术前最大QT间期(QTmax)、最大校正QT间期(QTcmax)、QTd及QTcd均较对照组明显增大,差异具有统计学意义(P<0.01);介入手术后QTmax、QTcmax、QTd及QTcd比术前明显降低,差异具有统计学意义(P<0.01)。而单独进行冠脉造影对QT离散度无明显影响。结论AMI患者QTd和QTcd明显高于正常人,而AMI恢复期介入治疗可使QTd和QTcd显著降低,从而降低急性心肌梗死后恶性心律失常和心源性猝死的发生率,改善AMI患者的预后。     

急性心肌梗死患者外周血液单核细胞中血管内皮生长因子的表达

目的　探讨急性心肌梗死 ( AMI)后外周血单核细胞中血管内皮生长因子 ( VEGF)的表达及其与 AMI左心室收缩功能的关系。方法　分别抽取 2 5例行急诊经皮冠状动脉介入 ( PCI)治疗的 AMI患者发病后第 1、5、10和15 d的外周静脉血 ,分离、培养单核细胞 ,用酶联免疫吸附法 ( ELISA)测定 VEGF浓度。结果　单核细胞分泌的VEGF在 AMI后第 5 d即达高峰 ,显著高于对照组 ( 3 43 .2± 82 .5 pg/ml vs 14 3 .3± 2 4.2 pg/m l,P<0 .0 5 )。单核细胞分泌的 VEGF峰植与肌酸磷酸激酶 ( CK)峰值无显著相关。 PCI术后左心室收缩功能改善的 AMI患者 ,其单核细胞分泌的 VEGF水平显著高于左心室收缩功能未改善者 ( 867.6± 113 .1pg/ml vs2 3 4.8± 82 .4pg/ml,P<0 .0 5 )。结论　AMI患者 PCI术后单核细胞产生的 VEGF与左心室收缩功能改善有关     

老年急性心肌梗死急诊介入治疗临床疗效评价

目的评价老年急性心肌梗死(AM1)患者直接经皮冠状动脉介入治疗(PCI)临床疗效。方法回顾分析78例老年和54例非老年AMI患者梗死相关血管(IRA)急诊PCI的结果,所有患者在术前、术后6h、术后1d、术后7d、术后1月测定C反应蛋白(CRP),临床随访造影及主要心血管事件。结果老年组PCI成功率97%、病死率2%、外周血管并发症发生率3%等与非老年组无显著性差异(P>0.05),心绞痛发作次数显著多于非老年组(P<0.05)。2组术后6h、术后1dCRP水平与术前相比明显增高(P<0.05),2组之间比较差异无显著性。结论老年AMI患者急诊PCI手术疗效预后与非老年组相近,无显著差异。     

美托洛尔在急性心急梗塞治疗中的应用及护理体会

目的:观察早期应用美托洛尔(商品名:倍他乐克)的疗效及护理体会。方法:选择30例急性心肌梗塞(AMI)患者,在胸痛12h内应用美托洛尔5mg静脉注射共3次,每次注射及间隔时间2~5min。结果:AMI急性期治疗组心脏事件(室性心律失常、心衰、猝死)的发生率显著低于对照组(P<0.05~<0.001)。结论:在严密观察下急性心肌梗塞早期应用美托洛尔安全,并可明显降低急性期心脏事件发生率。     

Cardiac function and maximal exercise capacity early after acute myocardial infarction.

The purpose of the study was to assess the relationship between left and right ventricular function measured at rest and maximal exercise capacity in patients with recent acute myocardial infarction (AMI). Forty-three male patients (Killip Class I, n = 36; Killip Class II, n = 7) with a wide range of left ventricular (LV) function and size underwent graded bicycle exercise testing less than 4 weeks after AMI (mean 21 days, 17-27). None of the patients had exercise limiting factors other than dyspnoea and fatigue. Left and right ventricular ejection fractions were determined by a radionuclide ventriculographic method which also allowed determination of absolute LV volumes and actual LV peak filling rate. LV ejection fraction had a weak association to estimated maximal oxygen uptake (VO2 max) (r = 0.37). No association was found between LV size, LV stroke volume, or LV peak filling rate and estimated VO2 max. Similarly, right ventricular ejection fraction showed no correlation to estimated VO2 max. Patients with well preserved LV function had a higher exercise induced increase in systolic blood pressure than patients with reduced LV function, but the increase in systolic blood pressure could not be used to estimate LV function with any reasonable accuracy. We conclude that the maximal exercise capacity of patients with recent AMI is virtually independent of their left and right ventricular function determined at rest, and that exercise testing and radionuclide ventriculography should be regarded as complementary procedures in the evaluation of patients with AMI.     

急性前壁心肌梗死患者相关血管再通后血液中成熟型肾上腺髓质素变化研究

目的探讨急性心肌梗死(AMI)再灌注后,有活性的成熟型肾上腺髓质素(AM)在冠状窦-主动脉差值是否有变化。方法对146例首次发生急性前壁心肌梗死患者和51例冠状动脉造影阴性作对照。入选的心肌梗死患者症状出现后24 h内完成冠状动脉腔内成形术(PICA)的再灌注治疗。再灌注后取主动脉和冠状窦血,测定血浆AM的两种分子形态(AM-m和AM-Gly)。结果AMI患者主动脉和冠状窦血浆AM-m,AM-Gly水平明显高于对照组[(1．7±1．4)pmol／L比(0．4±0．3)pmoL／L,P<0．01]。AMI患者血浆AM-m水平的冠状窦-主动脉差值明显高于对照组,而AM- Gly在两组之间差异无统计学意义(P=0．30)。AM-m的冠状窦-主动脉差值,在伴有左心室功能障碍的AMI患者(n=49)明显高于不伴有左心室功能障碍的AMI患者(n=97)。主动脉和冠状窦的血浆AM-m水平与左室射血分数呈负相关(r=-0．50,r=-0．48,P<0．01)。结论AMI再灌注后,尤其伴有严重左心室功能障碍的患者冠状动脉循环血液中AM的有活性的成熟型(AM-m)合成加速,提示AMI再通后AM经自分泌和(或)旁分泌可能对心血管起保护作用。