新生儿缺氧缺血性脑病患者血清心肌酶谱及cTnI水平变化及临床意义

目的 探讨血清心肌酶谱及心肌肌钙蛋白I(cTnI)检测在新生儿缺氧缺血性脑病(HIE)中的诊断意义。方法 收集65例HIE患儿(HIE组),采用日立7602生化仪检测血清心肌酶谱水平,采用化学发光法检测血清cTnI水平,并以68例健康新生儿为对照组,分析各组心肌酶谱及cTnI水平变化情况。结果 HIE组天门冬氨酸氨基转移酶(AST)、肌酸激酶(CK)、肌酸激酶MB同工酶(CK-MB)、乳酸脱氢酶(LDH)及α-羟丁酸脱氢酶(HBDH)的水平,分别为(98.9±9.6)U/L、(385.4±15.5)U/L、(89.3±9.6)U/L、(300.8±19.8)U/L、(399.1±17.9)U/L,均明显高于对照组(P<0.05)。HIE组cTnI水平为(1.4±0.4)ng/mL,高于对照组(P<0.05)。CK-MB检测新生儿HIE的灵敏度为88.6%,cTnI检测新生儿HIE的特异性为86.3%。结论 血清心肌酶谱及cTnI检测对新生儿HIE的诊断和治疗具有重要意义。     

心肌肌钙蛋白Ⅰ、肌红蛋白检测在急性心肌梗塞中的诊断价值

目的探讨CTnⅠ、Mb对急性心肌梗塞(AMI)早期诊断的价值.方法对26例AMI患者、41例不稳定性心绞痛(UAP)患者、30例骨骼肌损伤(SM)患者和30例健康者进行血清CTnⅠ、Mb、CK-MB的测定,并对AMI患者胸痛发生不同时段进行动态检测.结果 AMI患者入院时CTnⅠ、Mb、CK-MB的阳性检出率分别是65.4%、73.1%、53.8%.CK-MB在UAP组和SM组,Mb在SM组中有较高的阳性率,而CTnⅠ在UAP和SM组中未检出.CTnⅠ、Mb在AMI发生4h内就呈显著升高,三项指标的最高峰值在8～16h内均可出现,72h后Mb、CK-MB降至临界值,而CTnⅠ 7天后仍高于对照组.结论 CTnⅠ、CK-MB、Mb在AMI早期诊断价值基本相同,CTnI有更宽的诊断时间窗和独特的特异性,是AMI早期诊断的首选指标.     

Cardiac troponin: a new serum marker of myocardial injury in sepsis

Objective: Echocardiogram-derived left ventricular ejection fraction (LVEF) is usually utilized to evaluate left ventricular function, including that of septic patients. However, LVEF is greatly influenced by afterload. The aim of this study was to test the hypothesis that troponin I, a serum marker of myocardial injury, may be able to detect left ventricular involvement by the septic process, being at least as sensitive an indicator of left ventricular dysfunction as LVEF in these patients.¶Design: Comparison of echocardiogram-derived LVEF with serum levels of troponin I in ten critically ill septic patients.¶Setting: General intensive care unit in a tertiary care private hospital.¶Patients: Ten critically ill septic patients with no previous documented heart disease.¶Measurements and results: Patients were simultaneously submitted to a two-dimensional echocardiogram and troponin I determinations. LVEFs and troponin I levels were analyzed in a two-by-two table in order to validate troponin I as a new biochemical marker of myocardial injury in sepsis. All the patients whose LVEF was < 0.5 had elevated troponin I levels (kappa = 0.61, p = 0.035).¶Conclusions: Identification of myocardial dysfunction in septic patients has been a challenging task. Troponin I, a serum marker of myocardial injury, may be of great help in the recognition of myocardial involvement by sepsis in a noninvasive and readily available way.     

血清心肌肌钙蛋白对心肌损伤的临床诊断价值

目的　探讨定量分析肌钙蛋白T(cTnT)、肌钙蛋白I(cTnI)对心肌损伤程度评价的临床意义。方法　对80例心肌梗死患[急性心肌梗死(AMI)50例、陈旧性心肌梗死(OMI)30例]、100例心脏手术患、60例非心脏手术患和20例健康人进行了血清cTnT、cTnI、肌酸激酶同工酶(CK—MB)和肌酸激酶(CK)检测。结果　(1)血清cTnT、cTnI、CK—MB和CK检测心肌损伤的敏感度和特异性分别为cTnT(72.4％，100.0％)、cTnI(81.8％，100.0％)，CK—MB(54.6％，87.5％)和CK(64.8％，62.2％)。(2)AMI和心脏手术组cTnT、cTnI、CK—MB和CK四项指标浓度均显高于正常对照组(P＜0.01)。(3)急性心肌梗死组、心脏手术组3h内cTnT和cTnI阳性检出率分别为(50％，56％)和(44％，45％)，明显高于CK—MB(24％，22％)和CK(20％，28％)；急性心肌梗死组、心脏手术组5d后cTnT和cTnI阳性检出率为(70％，66％)和(66％，61％)，而CK—MB仅为(4％，6％)，CK仅为(8％，10％)。结论　血清cTnT、cTnI能确切反映急性心肌梗死、心脏手术等心肌损伤程度，具有较宽的诊断窗口时间，是心肌损伤较敏感和特异的血清标志物。     

肌钙蛋白I对不稳定型心绞痛患者近期预后判断的价值

目的　评价血清肌钙蛋白I(cTnI)定量检测对不稳定型心绞痛患者 (UAP)近期预后判断的价值。方法　用化学发光酶联免疫仪对 6 2例UAP患者 ,30例健康人分别进行了血清cTnI、肌酸磷酸激酶 (CK)及肌酸磷酸激酶同功酶 (CK MB)的检测 ,并观察UAP患者住院期间的心脏事件发生率。结果　 6 2例UPA患者中有 2 3例 (37.1 % )血清cTnI呈阳性 (cTnI>0 .1 μg/L) ,39例血清cTnI呈阴性 (cTnI<0 .1 μg/L) ,两组CK、CK MB水平差异无统计学意义。UAP患者cTnI阳性组 30天内发生急性心肌梗死、心源性死亡、顽固性心绞痛明显高于cTnI阴性组。结论　cTnI是反映心肌细胞损伤的高灵敏、高特异生化指标 ,cTnI水平的升高对判断不稳定型心绞痛患者近期预后有较好的预测价值。     

Role of cardiac troponin in the diagnosis of acute myocardial infarction in comatose patients resuscitated from out-of-hospital cardiac arrest

Background

Troponin is a major diagnostic criterion of acute myocardial infarction (AMI) but in out-of-hospital cardiac arrest (OHCA) patients, its diagnostic value may be altered by cardiopulmonary resuscitation.

Methods

Single-centre study assessing the diagnostic characteristics of troponin for AMI diagnosis in consecutive patients resuscitated from OHCA between 2002 and 2008 with coronary angiogram (CA) performed on admission. Patients with obvious non-cardiac cause of OHCA, unsustained or absent return of spontaneous circulation were excluded. AMI was defined on CA by the presence of acute occlusion or critical stenosis with intracoronary fresh thrombus easily crossed by an angioplasty wire. Troponin concentration was recorded once on admission and once 6–12 h after the OHCA.

Results

A total of 163 patients aged 56 (median) years (interquartile range (IQR) 48–65) was included, all comatose. Most prevalent initial OHCA rhythms were ventricular fibrillation (49%) and asystole (41%). AMI was diagnosed on coronary angiogram in 37% of the patients.Median troponin concentration on admission was 1.7 (0.3–10) ng ml⁻¹ and sensitivity for AMI diagnosis was 72% and specificity 75% for a 2.5 ng ml⁻¹ cut-off. A combined criterion comprising ST elevation and troponin >2.5 ng ml⁻¹ had a sensitivity of 93% and specificity of 64%.Six to twelve hours after the OHCA, median troponin concentration was 7.6 ng ml⁻¹ (1.4–47.5), sensitivity was 84% and specificity 84% for a 14.5 ng ml⁻¹ cut-off.

Conclusion

Troponin I has a good diagnostic value for AMI diagnosis in OHCA patients. In combination with ST elevation, troponin I on admission achieves a very high sensitivity.     

血清心肌肌钙蛋白I诊断新生儿窒息心肌损害的研究

目的 :探讨血清心肌肌钙蛋白 I(c Tn I)诊断新生儿窒息心肌损害的临床价值。方法 :采用免疫化学发光测定法 (CL IA)检测正常对照组 (2 0例 )、轻度窒息组 (2 0例 )和重度窒息组 (2 0例 )新生儿血清 c Tn I浓度。结果 :1血清 c Tn I浓度在窒息新生儿有明显增高 (F=81 .0 7,P<0 .0 1 ) ;对照组 c Tn I(0 .0 5± 0 .0 4)μg/ L与轻度组 (0 .30± 0 .2 8)μg/ L、重度组 (2 .6 5± 2 .73)μg/ L之间两两比较均存在非常显著性差异 (P均 <0 .0 1 ) ;2 4例重度窒息合并有心力衰竭新生儿血清 c Tn I浓度显著增高分别为 4.1 8、5 .40、7.6 7及 1 0 .43μg/ L ,浓度为1 0 .43μg/ L的患儿死亡。结论 :1 c Tn I可作为新生儿窒息心肌损害新的诊断金标准 ,有助于早期诊断 ;2 c Tn I明显增高或许对新生儿窒息合并心衰的预后有参考价值。     

酶联荧光分析法测定血清心肌肌钙蛋白I

目的对酶联荧光分析法(ELFA)检测血清心肌肌钙蛋白I(cTnI)进行方法学评价,并探讨其临床应用价值。方法系统研究ELFA法测定cTnI的精密度、灵敏度、线性范围、回收率、标准曲线的稳定性及干扰因素,并与酶联免疫吸附试验(ELISA)检测结果相比较。同时应用ELFA法测定50名正常人、62例非心肌梗死患者及53例急性心肌梗死(AMI)患者的血清cTnI水平。结果ELFA法检测cTnI的总CV值为2.58%～4.82%,分析灵敏度为0.05μg/L,线性范围0.1～50μg/L,稀释标本的平均回收率为101.2%,标准曲线至少可稳定14d。ELFA法(Y)与ELISA法(X)具有良好的相关性(Y=0.983X-0.148,r=0.996)。加入高浓度的胆红素、三酰甘油和血红蛋白对测定无显著性影响(P>0.05)。AMI患者血清cTnI[(18.6±4.8)μg/L]显著高于正常人[(0.068±0.014)μg/L]和非心肌梗死患者[(0.055±0.021)μg/L](P<0.01);cTnI诊断AMI的阈值为0.8μg/L,诊断敏感度、特异度、准确度分别为91.4%、93.8%、92.9%,阳性和阴性拟然比分别为14.6和0.09。结论ELFA法操作简便、结果准确可靠、自动化程度高,且检测快速,具有较高的精密度;cTnI是敏感、特异的心肌标志蛋白,适合在临床工作中推广应用。     

心肌肌钙蛋白Ⅰ在心肌梗死中的检测意义

目的:探讨心肌肌钙蛋白I(cTnI)在急性心肌梗死(AMI)时的检测意义。方法:比较102例冠心病患者的cTnI和心肌酶谱的测定结果。结果:AMI患者的阳性率分别为:cTnI 87.5％、CK-MB62.5％、CK56.3％、AST46.9％、LDH40.6％。结论:AMI患者胸痛后10h血清cTnI的敏感性最高,血清cTnI对AMI诊断的特异性明显高于心肌谱(CK、Cl-MB、AST和LDH),对诊断AMI有重大临床价值。     

心肌肌钙蛋白Ⅰ与肌酸激酶同工酶在儿童心肌损害诊断中的比较

目的:了解各病理状况对心肌肌钙蛋白I(cTnI)、肌酸激酶同工酶(CK-MB)的影响,并比较其诊断价值。方法:对4组儿童进行血清cTnI、CK-MB测定。A组为健康儿童54例;B组为一般状况可的非心血管疾病患儿53例;C组为病情稳定的先天性心脏病患儿12例;D组为急性心肌炎患儿14例。结果:A组cTnI值均<0.25"g/mL,各年龄组之间差异无显著性,CK-MB升高1例(1.9%)。A、B、C组cTnI值之间差异无显著性。B组cTnI升高1例(1.9%),CK-MB升高9例(16.9%);C组cTnI均不升高,CK-MB升高1例(8.3%);D组cTnI升高11例(78.6%),平均值较A组显著增高(P<0.01)。结论:cTnI可用来诊断儿童心肌损害,无心血管系统受累的患儿cTnI值不升高,心血管系统以外的疾病可影响CK-MB值。     

延迟心肌预缺血对急性心肌梗死预后保护的临床价值

目的　探讨延迟心肌预缺血对急性心肌梗死 (AMI)临床表现与近期预后的影响。方法　回顾性分析397例心绞痛 (心绞痛组 )病程大于 2周的AMI患者临床资料 ,与 371例无心绞痛史的AMI患者 (对照组 )比较。结果　心绞痛组合并休克、心衰者少于对照组 (分别为 1 0 .6 %对 1 6 .8%和 1 8.9%对 2 5 .9% ,P <0 .0 5 ) ,住院病死率也较低(1 0 .6 %对 1 6 .9% ,P <0 .0 5 ) ,肌酸激酶峰值较低 [(783± 4 83)U/L对 (1 0 86± 5 4 3)U/L ,P <0 .0 1 ],心绞痛组梗死前正规治疗者多于对照组 (6 8.8%对 2 8.6 % ,P <0 .0 0 1 ) ,但多部位梗死较少 (1 6 .4 %对 2 2 .3% ,P <0 .0 0 1 )。结论　与无心绞痛发作的患者比较 ,急性心肌梗死前有延迟心肌预缺血的冠心病患者梗死面积小 ,心源性休克及充血性心衰发生率低。     

不稳定性心绞痛、急性心肌梗死患者血清磷等8种元素变化的临床意义

目的　观察血清磷、钙、镁、铜、铁、锌、硒、镉 8种元素在不稳定性心绞痛 (UAP)、急性心肌梗死 (AMI)、稳定性心绞痛 (SAP)患者中的变化 ,以发现预测AMI的指标。方法　将 12 7例冠心病 (CHD)患者分为UAP组 6 6例、AMI组 4 6例、SAP组 15例 ,正常对照组 5 0例。抽取心绞痛发作或AMI发生 2 4小时内静脉血。利用电感耦合等离子体发射光谱法 (ICP AES)测定前述 8种元素在血清中的含量。随访心绞痛患者及正常人 6个月至 18个月。结果　UAP组的血清磷分别高于对照组、SAP组和AMI组 (P =0 .0 0 0 1,P =0 .0 0 0 1,P =0 .0 2 14 )。UAP组的血清钙分别高于对照组和AMI组 (P =0 .0 0 5 8,P =0 .0 0 0 9)。结论　血清磷 >170mg/L ,同时有血清钙 >10 0mg/L的UAP患者近期易发生AMI,可以作为预测AMI的指标     

Role of cardiac troponin I in the evaluation of myocardial injury

Cardiac troponin I (cTnI) is highly specific for cardiac muscle. In this study, we compared the utility of CK and CK-MB index versus cTnI in the assessment of myocardial infarction in 155 patients being evaluated for myocardial damage. As a cardiac marker for MI, Troponin I seems to be superior to CK-MB. In the subset of patients with renal disease, cTnI has definite advantages over CK-MB. In addition, the use of cTnI has the potential to replace the measurement of lactate dehydrogenase isoenzymes. J. Clin. Lab. Anal. 12:276–279, 1998. © 1998 Wiley-Liss, Inc.     

慢性心绞痛史及梗死前心绞痛对急性心肌梗死心肌损伤及预后的影响

目的探讨有无慢性心绞痛史及梗死前心绞痛对急性心肌梗死患者心肌损伤及预后的影响。方法选择2003年1月至2007年12月确诊为急性心肌梗死而收住院的93例急性心肌梗死患者,根据其急性心肌梗死发病前心绞痛病史情况分为4组,慢性心绞痛组（Ⅰ组）、梗死前心绞痛组（Ⅱ组）、慢性心绞痛伴梗死前心绞痛组（Ⅲ组）、无心绞痛组（Ⅳ组）,分别观察心肌梗死范围,测定心脏肌酸磷酸激酶（CPK）、同功酶（CK—MB）、血清肌钙蛋白（CTnT）、C-反应蛋白（CRP）和尿微自蛋白分泌率（AER）变化,以及住院期间严重心脏并发症（严重心律失常、KillipⅡ级以上心力衰竭、心源性休克）、心源性病死率、梗死后心绞痛发生率。结果小面积心肌梗死前发生率Ⅰ、Ⅱ、Ⅲ组明显高于Ⅳ组,差异有统计学意义（P〈0．05）;CK、CK—MB、CTnT峰值浓度、CRP、AER变化,Ⅰ、Ⅱ、Ⅲ组明显低于Ⅳ组,差异有统计学意义（P〈0．05）;严重心脏并发症,除心律失常外,Ⅰ、Ⅱ、Ⅲ组明显低于Ⅳ组,差异有统计学意义（P〈0．05）,心律失常Ⅱ、Ⅲ组明显低于Ⅰ、Ⅳ组,差异有统计学意义（P〈0．05）;梗死后心绞痛及住院病死率Ⅰ、Ⅱ、Ⅲ组明显低于Ⅳ组,差异有统计学意义（P〈0．05）。结论梗死前有心绞痛史及梗死前心绞痛可减少其后发生急性心肌梗死时心肌损伤的程度,并影响预后。     

Changes and significance of serum troponin in trauma patients: A retrospective study in a level I trauma center

BACKGROUND: Elevated troponin I(TnI) is common among trauma patients. TnI is an indicator of myocardial injury, but clinical diagnosis of blunt cardiac injury cannot be based solely on an increase in TnI. Therefore, this study aims to explore the changes and clinical significance of serum TnI in trauma patients. METHODS: The clinical data of consecutive trauma patients admitted to our trauma center between July 1, 2017 and July 31, 2020 were retrospectively analyzed. According to TnI levels within 24 hours of admission, patients were divided into the elevated and normal TnI groups. According to the TnI levels after 7 days of admission, a graph depicting a change in trend was drawn and then analyzed whether TnI was related to in-hospital mortality. RESULTS: A total of 166 patients(69 and 97 cases with elevated and normal TnI, respectively) were included in this study. The average hospital stay, intensive care time, mechanical ventilation time, and in-hospital mortality were higher in the elevated TnI group than in the normal TnI group(P<0.05). The TnI level of trauma patients gradually increased after admission and peaked at 48 hours(7.804±1.537 ng/mL). Subsequently, it decreased, and then recovered to normal within 7 days. However, 13 patients did not recover. Logistic regression analysis revealed that abnormal TnI at 7 days was independently related to in-hospital mortality. CONCLUSIONS: Trauma patients with elevated TnI levels may have a worse prognosis. Monitoring the changes in serum TnI is important, which can reflect the prognosis better than the TnI measured immediately after admission.     

高敏心肌肌钙蛋白I与心肌肌钙蛋白T预测心血管事件的对比研究

目的比较高敏心肌肌钙蛋白(high-sensitivity cardiac troponin I,hs-cTnI)与心肌肌钙蛋白(cardiac troponin T,cTnT)对非ST段抬高型急性冠状动脉综合征(急性冠脉综合征)患者心血管事件的预测价值。方法采集103例连续的不稳定型心绞痛和非ST段抬高型急性心肌梗死患者的血浆样品,分别采用电化学发光免疫法和VITROS化学发光免疫分析法检测cTnT和hs-cTnI。采用工作者特征曲线评估心血管事件的发生率,确定hs-cTnI与cTnT的最佳预测值。结果 hs-cTnI与cTnT均能显著预测心血管事件,两者差异无统计学意义(P=0.75)。两种心脏标志物的最佳预测值分别为hs-cTnI>0.055μg/L和cTnT>0.010μg/L,敏感度均为90%,特异度均为52%;hs-cTnI阳性患者的心血管事件发生率为17%,而hs-cTnI阴性患者的心血管事件发生率为2%,两者差异有统计学意义(P=0.02)。结论 hs-cTnI与cTnT对非ST段抬高型急性冠脉综合征患者心血管事件有相似的预测诊断价值。     

优降糖对KATP通道介导缺血预适应心肌再灌注损伤的影响

目的 :探讨优降糖在完整大鼠心脏模型中 ,对 ATP敏感钾通道 (KATP)介导心肌缺血预适应作用的影响。方法 :将 4 4只大鼠随机分为 4组 :心肌缺血预适应组 (IPC组 )、优降糖组 (GL I组 )、优降糖 IPC组 (G P组 )和对照组 (C组 )。心肌缺血预适应由 3次 10分钟缺血和 10分钟再灌注组成。所有大鼠均接受 30分钟缺血和 6 0分钟再灌注。梗死范围由饱和曲利本蓝和红四氮唑蓝染色判定 ,并以坏死区占缺血区的百分比表示。 导联记录心脏室性心律失常。结果 :IPC能显著缩小缺血再灌注后的心肌梗死范围 ,且这种作用能被 KATP通道阻滞剂优降糖完全取消。 IPC可减少缺血再灌注所致的室性心律失常的发生 ,但这种保护作用不能被优降糖所阻断。结论 :优降糖对 KATP介导 IPC的心肌保护作用有影响。     

肌钙蛋白I和T测定对急性心肌梗塞的诊断意义

目的探讨肌钙蛋白I（cTnI）和肌钙蛋白T（cTnT）测定对急性心肌梗塞（AMI）的诊断价值。方法对52例AMI患者采用免疫层析法进行检测cTnI和cTnT,以对照区和检测区均有显色带者为阳性,并作灵敏度和特异性的比较。结果以胸痛0～3h、4～6h两个时段观察其灵敏度,cTnI为56.7%和96.1%;cT-nT为50.0%和92.3%。特异性cTnI为100%和96.2%;cTnT为100%和91.6%。cTnI灵敏度高于cTnT,特异性cTnI与cTnT之间无显著性差异。结论对AMI急性胸痛患者可同时进行cTnI和cTnT检测,有利于AMI的诊断和治疗。     

肌钙蛋白Ⅰ在急性心肌梗死早期诊断和心肌再梗死中的价值

目的探讨心肌肌钙蛋白I(cTnI)在急性心肌梗死(AMI)早期诊断和心肌再梗死中的价值。方法测定131例AMI发作2～10 h患者的血清cTnI和肌酸激酶同工酶(CK-MB)的浓度,并以122名健康体检者作对照,绘制并分析受试者工作特征(ROC)曲线。结果AMI组发病早期血清cTnI和CK-MB水平与对照组相比差异有统计学意义(P<0.01);AMI后2～10 h cTnI和CK-MB的ROC曲线下面积(AUC)分别为:0.925、0.991、0.998和0.648、0.719、0.831;在AMI后2～10 h cTnI和CK-MB各指标临界值对应的敏感度分别为90.6%、97.6%、97.7%和54.1%、56.9%、76.9%;特异度分别为87.3%、95.4%、98.5%和87.3%、93.5%、88.1%;AMI发作10 h的患者若cTnI>20.1μg/L时,心肌再梗死与cTnI相关性良好(r=0.74)。结论cTnI在AMI早期诊断和预测再梗死中有一定的应用价值。