A MXene-functionalized paper-based electrochemical immunosensor for label-free detection of cardiac troponin I

Convenient,rapid,and accurate detection of cardiac troponin I(cTnI)is crucial in early diagnosis of acute myocardial infarction(AMI).A paper-based electrochemical immunosensor is a promising choice in this field,because of the flexibility,porosity,and cost-efficacy of the paper.However,paper is poor in electronic conductivity and surface functionality.Herein,we report a paper-based electrochemical immunosensor for the label-free detection of cTnI with the working electrode modified by MXene(Ti_(3)C_(2))nanosheets.In order to immobilize the bio-receptor(anti-cTnI)on the MXene-modified working electrode,the MXene nanosheets were functionalized by aminosilane,and the functionalized MXene was immobilized onto the surface of the working electrode through Nafion.The large surface area of the MXene nanosheets facilitates the immobilization of antibodies,and the excellent conductivity facilitates the electron transfer between the electrochemical species and the underlying electrode surface.As a result,the paper-based immunosensor could detect cTnI within a wide range of 5-100 ng/mL with a detection limit of 0.58 ng/mL.The immunosensor also shows outstanding selectivity and good repeatability.Our MXene-modified paper-based electrochemical immunosensor enables fast and sensitive detection of cTnI,which may be used in real-time and cost-efficient monitoring of AMI diseases in clinics.

Characteristics of elevated cardiac troponin I in patients with acute ischemic stroke

ObjectiveTo 学习心脏的 troponin 的预示的特征我(cTnI ) 在尖锐 ischemic stroke.MethodsWe 的举起回顾地学习了病人(n = 248 ) 与尖锐 ischemic 击，尖锐圣片断举起心肌的梗塞，和尖锐 non-ST-elevation 心肌的梗塞在 2013 年 1 月和 2015 年 10 月之间被对待。在在这三个组之中的 cTnI 层次的基线人口统计的数据和变化被比较。有尖锐 ischemic 击的病人被分到 cTnI 举起组也(cTnI > 0.034 ng/mL ) 或没有 cTnI 举起组(cTnI 0.034 ng/mL ) 。逻辑回归分析被用来识别与尖锐 ischemic 击在病人与提高的浆液 cTnI 联系的风险因素。而且，医院停留和主要心血管的结果的发生的持续时间与尖锐 ischemic 击在病人被作比较，与尖锐 ischemic 击与这或没有提高的 cTnI.ResultsIn 学习病人的人口( n = 178 )，尖锐圣片断举起心肌的梗塞( n = 35 )，并且尖锐 non-ST-elevation 心肌的梗塞( n = 35 )，有有提高的 cTnI 的尖锐 ischemic 击的病人包括了18.5%题目。有提高的 cTnI 的病人更老、更可能有高血压的历史。另外，这些病人有煽动性的标记，减少的肾的功能，增加的 D 暗淡层次，更高的 NIH 击分数，和更低的左室的喷射部分的高水平。逻辑回归分析两个都显示出那百分比嗜中性并且 NIH 击分数被提高；估计的 glomerular 过滤率和左室的喷射部分与尖锐 ischemic 击在病人被减少提高了 cTnI，并且他们在与尖锐 ischemic 击在病人检测的医院 stay.ConclusionElevated cTnI 期间有更经常的主要心血管的事件，在医院停留期间显示了差的短期的预后的更大的可能性的。

Differential IFN-Gamma (IFN-γ), Interleukin 10 (IL-10) and Cardiac Troponin I (cTnI) Responses in Natural Bovine Trypanosomosis in Nigeria

Trypanosomosis is major drawback to profitable livestock production in sub-Sahara African, including Nigeria. Knowledge of the cytokines production in the phase of natural infection may help to better diagnose, treat and prevent bovine trypanosomosis. The purpose of the this study was to determine the levels of interferon-gamma (IFN-γ), interleukin-10 (IL-10) and cardiac troponin–I (cTnI) in the sera of cattle naturally infected with T. brucei, T. congolense and T. vivax and correlate these levels with parasitaemia and PCV of the infected animals. Five milliliter of blood samples were collected via the jugular vein from 411 randomly selected cattle into EDTA and non-citrated bottle. PCV was determined manually using HCT. Trypansomes were detected and characterized by microscopy and PCR, respectively. Serum levels of IFN-γ, IL-10 and cTnI were determined using commercial ELISA kit. Data were summarized using descriptive statistic and significance of differences determined by ANOVA. Of the 62 samples positive for trypanosomes by microscopy, 50 samples were confirmed to species level by PCR. The sera levels of IFN-γ, IL-10 and cTnI of infected cattle were higher than non-infected cattle. The differences were not significant (p γ, IL-10 and cTnI in cattle with natural trypanosomosis. Further investigation is required to understand the specific effect of trypanosomes on myocardiac integrity and interaction between the two cytokines in natural trypanosomosis in cattle.

Elevated level of high-sensitivity cardiac troponin I as a predictor of adverse cardiovascular events in patients with heart failure with preserved ejection fraction

Background:The relationship between the elevation of cardiac troponin and the increase of mortality and hospitalization rate in patients with heart failure with reduced ejection fraction is clear.This study investigated the association between the extent of elevated levels of high-sensitivity cardiac troponin I(hs-cTnI)and the prognosis in heart failure with preserved ejection fraction patients.Methods:A retrospective cohort study consecutively enrolled 470 patients with heart failure with preserved ejection fraction from September 2014 to August 2017.According to the level of hs-cTnI,the patients were divided into the elevated level group(hs-cTnI>0.034 ng/mL in male and hs-cTnI>0.016 ng/mL in female)and the normal level group.All of the patients were followed up once every 6 months.Adverse cardiovascular events were cardiogenic death and heart failure hospitalization.Results:The mean follow-up period was 36.2±7.9 months.Cardiogenic mortality(18.6%[26/140]vs.1.5%[5/330],P<0.001)and heart failure(HF)hospitalization rate(74.3%[104/140]vs.43.6%[144/330],P<0.001)were significantly higher in the elevated level group.The Cox regression analysis showed that the elevated level of hs-cTnI was a predictor of cardiogenic death(hazard ratio[HR]:5.578,95%confidence interval[CI]:2.995-10.386,P<0.001)and HF hospitalization(HR:3.254,95%CI:2.698-3.923,P<0.001).The receiver operating characteristic curve demonstrated that a sensitivity of 72.6%and specificity of 88.8%for correct prediction of adverse cardiovascular events when a level of hs-cTnI of 0.1305 ng/mL in male and a sensitivity of 70.6%and specificity of 90.2%when a level of hs-cTnI of 0.0755 ng/mL in female were used as the cut-off value.Conclusion:Significant elevation of hs-cTnI(≥0.1305 ng/mL in male and≥0.0755 ng/mL in female)is an effective indicator of the increased risk of cardiogenic death and HF hospitalization in heart failure with preserved ejection fraction patients.

Intranuclear cardiac troponin I plays a functional role in regulating Atp2a2 expression in cardiomyocytes

In the past studies,it is shown that cardiac troponin I(cTnI,encoded by TNNI3),as a cytoplasmic protein,is an inhibitory subunit in troponin complex,and involves in cardiomyocyte diastolic regulation.Here,we assessed a novel role of cTnI as a nucleoprotein.Firstly,the nuclear translocation of cTnI was found in mouse,human fetuses and rat heart tissues.In addition,there were differences in percentage of intranuclear cTnI in different conditions.Based on weighted gene co-expression network analyses(WGCNA)and verification in cell experiments,a strong expression correlation was found between TNNI3 and Atp2a2,which encodes sarco-endoplasmic reticulum Ca2t ATPase isoform 2a(SERCA2a),and involves in ATP hydrolysis and Ca2t transient.TNNI3 gain and loss caused Atpa2a2 increase/decrease in a dosedependent manner both in mRNA and protein levels,in vivo and in vitro.By using ChIP-sequence we demonstrated specific binding DNA sequences of cTnI were enriched in ATP2a2 promoter239we889 region and the specific binding sequence motif of cTnI was analyzed by software as"CCAT",which has been reported to be required for YY1 binding to the promoter region of YY1-related genes.Moreover,it was further verified that pcDNA3.1()-TNNI3 could express cTnI proteins and increase the promoter activity of Atp2a2 through luciferase report assay.In the end,we evaluated beat frequencies,total ATP contents,Ca2t transients in TNNI3-siRNA myocardial cells.These findings indicated,for the first time,cTnI may regulate Atp2a2 in cardiomyocytes as a co-regulatory factor and participate in the regulation of intracellular Ca ions.

超声心动图联合血清cTnI、GDF-15检测对老年乳腺癌患者术后化疗心脏损伤的评估价值

目的探究超声心动图联合血清心肌肌钙蛋白I(cTnI)、生长分化因子-15(GDF-15)对老年乳腺癌(BC)患者术后化疗心脏损伤的评估价值。方法选取北京市大兴区人民医院2019年9月至2022年8月收治的112例老年BC术后应用表柔比星为主的化疗患者为研究对象,按照是否发生心脏损伤将其分为:心脏损伤组(40例)和心脏未损伤组(72例)。评估超声心动图对老年BC患者术后化疗心脏损伤的诊断价值;采用酶联免疫吸附法检测两组血清cTnI、GDF-15水平;采用受试者工作特征曲线评估血清cTnI、GDF-15对老年BC患者术后化疗心脏损伤的诊断价值;以心脏损伤判定标准为金标准,评价超声心动图、血清cTnI、GDF-15及三者联合对老年BC患者术后化疗心脏损伤的诊断价值。结果超声心动图诊断老年BC患者术后化疗心脏损伤的灵敏度、特异度、准确度分别为77.50%、88.89%、84.82%;心脏损伤组患者血清cTnI、GDF-15水平均明显高于心脏未损伤组(P<0.05);血清cTnI、GDF-15诊断老年BC患者术后化疗心脏损伤的曲线下面积分别为0.864、0.834,截断值分别为221.88 ng/L、8.06 ng/L,灵敏度分别为75.00%、80.00%,特异度分别为94.44%、87.50%,准确度分别为87.50%、84.82%;超声心动图联合血清cTnI、GDF-15诊断老年BC患者术后化疗心脏损伤的灵敏度、特异度、准确度分别为97.50%、86.11%、90.18%,优于单独诊断。结论超声心动图联合血清cTnI、GDF-15对老年BC患者术后化疗致心脏损伤有较高诊断价值,可有效提高灵敏度、准确度,具有较高特异度。

Value of transthoracic echocardiography combined with cardiac troponin I in risk stratification in acute pulmonary thromboembolism

背景尖锐肺的 thromboembolism (无尾猿) 引起恰好室的机能障碍(RVD ) 和心脏的 troponin 我(cTnI ) 举起。有 RVD 和 cTnl 举起的病人有更坏的预后。因此， RVD 的早察觉和 cTnl 举起为风险层化是有益的。在这研究，我们估计了 14 天的不利临床的事件并且在 APEpatients 的广谱之中在风险层化把 RVD ontransthoracic 回响心动描记法(TTE ) 与 cTnl 相结合。未来的多中心试用从 12collaborating 医院带着证实的无尾猿包括了 90 个病人的方法。TTE 上的尖锐 RVD 面对至少 2 下列被诊断：恰好室的膨胀(没有肥大) ，劣等的静脉腔(IVC ) 的吸入的倒塌的损失，恰好室(RV ) 运动机能减退，有三个尖头的丢回的喷气 velocity】2.8 m/s。学习病人在表示根据临床的 andechocardiographic 调查结果被划分成二个组：组Ⅰ：有 RVD 的 50 个病人；组Ⅱ：没有 RVD 的 40 个病人。多于病人的一半结果(50/90， 55.6%) 有的 RVD。(26/90,28.9%) 将近三分之一在表示病人提高了 cTnl 并且仅仅 4.2% 在在起始的治疗以后的第四天。一个多重逻辑回归模型暗示 RVD，正确、左的室的 end-diastolicdiameter 比率(RVED/LVED ) ，和 cTnI 独立地预言不利 14 天的临床的结果(P【0.01 ) 。接收装置操作特征(巨鸟) 曲线表明产出最高的区别力量的截止价值 ofRVED/LVED 和 cTnl 分别地是 0.65 和 0.11 ng/ml。而且，在有 RVD 和 elevatedcTnl 的病人的一个不利 14 天的临床的事件的发生更大(40.7%) 比在有提高的 cTnI 或积极 RVD 的病人独自一个(0% 和 8.3% ，分别地)(P【0.001 ) 。结论 RVD， RVED/LVED，和 cTnI 是 14-dayclinical 结果的独立预言者。有比 0.65 大的 RVED/LVED 和比在表示的 0.11 ng/ml 高的 cTnI 的病人可能有不利 14 天的事件。与 cTnI 相结合的 RVD 能与更多看守预后识别无尾猿病人的亚群。

深静脉血栓形成患者下肢深静脉血栓密度、血清cTnI、Hcy水平与合并肺栓塞风险的关系研究

目的探讨深静脉血栓(DVT)形成患者下肢深静脉血栓密度、血清心肌肌钙蛋白I(cTnI)及同型半胱氨酸(Hcy)水平与合并肺栓塞风险的关系。方法回顾性分析2016年1月至2019年1月在秦皇岛市第一医院进行治疗的108例DVT患者,依据是否合并肺栓塞分为对照组(单纯DVT)68例,观察组(DVT合并肺栓塞)40例。收集两组基线资料[年龄、性别、高血压史、高血脂史、慢性肺部疾病、脑血管意外、下肢骨折、吸烟史、饮酒史、血栓受累肢体、受累静脉、下肢深静脉血栓密度比、wells评分、血小板计数(PLT)、中性粒细胞计数(NEUT)、C反应蛋白(CRP)、D二聚体(D-D)、cTnI及Hcy水平]并进行比较,分析DVT合并肺栓塞的影响因素。根据肺栓塞危险程度将DVT合并肺栓塞患者划分为高危组(n=10)、中危组(n=17)、低危组(n=13);比较不同危险程度肺栓塞间下肢深静脉血栓密度、血清cTnI、Hcy水平及wells评分间差异。分析下肢深静脉血栓密度、血清cTnI及Hcy水平与wells评分的关系。结果两组患者年龄、性别、高血压、高血脂、慢性肺部疾病、脑血管意外、下肢骨折、吸烟史、饮酒史、血栓受累肢体及受累静脉比较,差异均无统计学意义(P>0.05);观察组下肢深静脉血栓密度比、wells评分、PLT、NEUT、CRP、D-D、cTnI及Hcy水平分别为(52.37±12.19)%、(5.16±1.07)分、(284.63±90.72)×10^(9)/L、(71.22±10.16)%、(15.29±2.39)mg/L、(1051.27±271.19)ng/mL、(0.33±0.13)ng/mL、(21.27±2.16)μmol/L,均高于对照组[41.67±10.28)%、(3.28±0.94)分、(206.27±86.15)×10^(9)/L、(64.31±8.75)%、(10.33±1.71)mg/L、(739.52±206.34)ng/mL、(0.21±0.06)ng/mL、(10.19±1.75)μmol/L],差异均有统计学意义(P<0.05)。Logistic回归分析结果显示,下肢深静脉血栓密度比、wells评分、cTnI及Hcy为DVT合并肺栓塞的独立预测因子(P<0.05)。肺栓塞低危组下肢深静脉血栓密度比、cTnI、Hcy水平及wells评分均低于中危组、高危组,差异均有统计学意义(P<0.05)。经Spearman相关性分析,下肢深静脉血栓密度比、cTnI、Hcy水平与wells评分呈正相关(P<0.05)。结论DVT患者下肢深静脉血栓密度、血清cTnI、Hcy可有效预测合并肺栓塞,同时可判断患者肺栓塞严重程度。

Comparison of plasma microRNA-1 and cardiac troponin T in early diagnosis of patients with acute myocardial infarction

BACKGROUND:Early reperfusion can effectively treat acute myocardial infarction(AMI) and reduce the mortality signif icantly. This study aimed to compare the role of plasma microRNA-1(miR-1) and cardiac troponin T(cTnT) in early diagnosis of AMI patients.METHODS:From May 2011 to May 2012,plasma samples were collected from 56 AMI patients and 28 non-AMI controls. The expression of plasma miR-1 was measured by quantitative reverse transcription-polymerase chain reaction(qRT-PCR),and the level of plasma cTnT was measured using electrochemiluminescence-based methods on an Elecsys 2010 Immunoassay Analyzer. SPSS 16.0 was used for the statistical analysis of the results. Data were expressed as mean±standard deviation unless otherwise described. The differences about clinical characteristics between the AMI patients and controls were tested using Student's t test or Fisher's exact test. The Mann-Whitney U test was conducted to compare the expression of microRNAs between the AMI patients and controls. MicroRNAs expression between different intervals of the AMI patients was compared using Wilcoxon's signed-rank test. The receiver operating characteristic(ROC) curve was established to discriminate the AMI patients from the controls.RESULTS:In the present study,the expression of plasma miR-1 was signifi cantly increased in the AMI patients compared with the healthy controls(P<0.01). The plasma miR-1 in the AMI patients decreased to the normal level at 14 days(P>0.05). The expression of plasma miR-1 was not related to the clinical characteristics of the study population(P>0.05). ROC curve analyses demonstrated that miR-1 was specifi c and sensitive for the early diagnosis of AMI,but not superior to cTnT.CONCLUSION:Plasma miR-1 could be used in the early diagnosis of AMI,but it is similar to cTnT.

The combination of creatine kinase-myocardial band isoenzyme and point-of-care cardiac troponin/contemporary cardiac troponin for the early diagnosis of acute myocardial infarction

BACKGROUND:The early diagnosis of acute myocardial infarction(AMI)remains challenging,especially for institutions without the high-sensitive cardiac troponin(hs-c Tn)assay.Herein,we aim to assess the value of creatine kinase-myocardial band isoenzyme(CK-MB)combined with different cardiac troponin(c Tn)assays in AMI diagnosis.METHODS:This multicenter,observational study included 3,706 patients with acute chest pain from September 1,2015,to September 30,2017.We classified the participants into three groups according to the c Tn assays:the point-of-care c Tn(POC-c Tn)group,the contemporary c Tn(c-c Tn)group,and hs-c Tn group.The diagnostic value was quantified using sensitivity and the area under the curve(AUC).RESULTS:Compared to the single POC-c Tn/c-c Tn assays,combining CK-MB and POC-c Tn/c-c Tn increased the diagnostic sensitivity of AMI(56.1%vs.63.9%,P<0.001;82.7%vs.84.3%,P=0.025).In contrast,combining CK-MB and hs-c Tn did not change the sensitivity compared with hs-c Tn alone(95.0%vs.95.0%,P>0.999).In the subgroup analysis,the sensitivity of combining CKMB and c-c Tn increased with time from symptom onset<6 h compared with c-c Tn alone(72.8%vs.75.0%,P=0.046),while the sensitivity did not increase with time from symptom onset>6 h(97.5%vs.98.3%,P=0.317).The AUC of the combination of CK-MB and POC-c Tn significantly increased compared to the single POC-c Tn assay(0.776 vs.0.750,P=0.002).The AUC of the combined CKMB and c-c Tn/hs-c Tn assays did not significantly decrease compared with that of the single c-c Tn/hs-c Tn assays within 6 h.CONCLUSIONS:The combination of CK-MB and POC-c Tn or c-c Tn may be valuable for the early diagnosis of AMI,especially when hs-c Tn is not available.

Impact of training specificity on exercise-induced cardiac troponin elevation in professional athletes: A pilot study

BACKGROUND Release of cardiac biomarkers is common after strenuous endurance exercise,but data on intermittent exercise are scarce.It has not been investigated whether cardiac troponin elevation is influenced depending on the type of exercise that an athlete is adapted to perform.We hypothesized that intermittent but not continuous exercise induces cardiac troponin elevation in professional athletes adapted to high-intensity intermittent exercise.AIM To examine how training specificity impacts high-sensitivity cardiac troponin T(hs-cTnT)release.METHODS Nine professional floorball players participated in the study,which comprised two different exercise tests:a continuous incremental cycle ergometer test and a Yo-Yo Intermittent Recovery 2(Yo-Yo IR2)test.Serial assessment of hs-cTnT was performed after the cycle ergometer test and the Yo-Yo IR2 test(baseline,0,2,6,and 24 h).RESULTS No hs-cTnT elevation above the myocardial damage cutoff(≥14 ng/L)was shown after the cycle ergometer test,whereas hs-cTnT levels rose over the cutoff in three of nine participants after the Yo-Yo IR2 test.The hs-cTnT levels peaked at 6 h after both tests,but were significantly higher after the Yo-Yo IR2 test compared to the cycle ergometer test(median hs-cTnT concentration 10.6 ng/L vs 7.8 ng/L,P=0.038).All levels returned to baseline within 24 h.CONCLUSION In professional athletes adapted to high-intensity intermittent exercise,hs-cTnT was significantly elevated after intermittent but not continuous exercise.This principle of specificity training should be considered when designing future studies to avoid misinterpretation of hs-cTnT elevation.

Comparison of serum cardiac troponin-Ⅰ and creatine kinase MB isoenzyme concentrations in asphyxiated neonates

Objective:To assess the correlation of signs of myocardial damage to serum cardiac troponin I(cTnI)and creatine kinase MB isoenzyme(CK-MB)concentrations.Methods:Blood samples were collected from 25 term asphyxiated neonates and 25 controls at 12 h of age by immunoassay.The asphyxiated neonates were followed up until discharge or death.Results:Asphyxiated neonates had significantly higher concentrations of cTnI and CK-MB than controls(P<0.001).Serum cTnI concentrations were significantly higher in asphyxiated neonates who developed hypotension,heart failure or those had low ejection fraction(P<0.01).Serum cTnI concentrations were significantly higher in asphyxiated who died than those who survived(P<0.01).There was no significant difference in serum CK-MB mass concentrations between asphyxiated neonates with and without these complications.Conclusion:Unlike CK-MB,serum cTnI concentrations are significantly higher in asphyxiated neonates who died or developed cardiac dysfunction.

新生儿缺血缺氧性脑病患儿cTnI、CK-MB、IL-6及hs-CRP表达水平及意义

目的探讨新生儿缺血缺氧性脑病(HIE)患儿心肌肌钙蛋白I(cTnI)、肌酸激酶同工酶(CK-MB)、白细胞介素-6(IL-6)及超敏C-反应蛋白(hs-CRP)表达水平及意义。方法选取2019年2月—2021年11月本院收治的90例HIE患儿作为病例组,另选取同期健康体检新生儿66例作为对照组,采用酶联免疫吸附法(ELISA)检测两组患者血清cTnI、CK-MB、IL-6及hs-CRP水平,分析cTnI、CK-MB、IL-6、hs-CRP表达差异及其与HIE严重程度和预后的诊断价值。结果重度组患儿血清cTnI、CK-MB、IL-6及hs-CRP水平高于轻度组和中度组(P<0.05);Spearman相关性分析显示,cTnI表达与CK-MB、IL-6及hs-CRP表达呈正相关(P<0.05),CK-MB表达与IL-6、hs-CRP表达呈正相关(P<0.05),IL-6表达与hs-CRP表达呈正相关(P<0.05);预后不良组患儿血清cTnI、CK-MB、IL-6及hs-CRP水平高于预后良好组(P<0.05);ROC曲线分析显示,cTnI、CK-MB、IL-6、hs-CRP联合预测HIE预后的AUC为0.937高于cTnI的0.702、CK-MB的0.831、IL-6的0.774,hs-CRP的0.743(P<0.05)。结论HIE患儿血清cTnI、CK-MB、IL-6及hs-CRP随着病情加剧表达升高,可用于预后诊断。

Effect of Cardioplegia for Myocardial Protection in Pediatric Cardiac Surgery:A Network Meta-Analysis

Cardioplegia has been widely used to reduce myocardial injury during pediatric cardiac surgery;however,which cardioplegia solution has the best protective effect has not been established.Thus,we compared the myocardial protective effects of different cardioplegia solutions used in pediatric cardiac surgery.Seven databases were searched to identify the relevant randomized controlled trials.A network meta-analysis with a Bayesian framework was conducted.The outcomes included the following biochemical and clinical outcomes:serum concentrations of the creatine kinase-myocardial band at 6 h postoperatively;cardiac troponin I(cTnI)at 4,12,and 24 h postoperatively;spontaneous beating after declamping;postoperative arrhythmias;inotropic support percentage and duration;mechanical ventilation hours;intensive care unit stay in days;hospital stay in days;and mortality.The group treated with cold crystalloid cardioplegia(cCCP)was chosen as the control group.The 22 studies involved 1529 patients.Six types of cardioplegia solutions were described in these studies,including cold blood cardioplegia,cCCP,del Nido,histidine-tryptophan-ketoglutarate(HTK),terminal warm blood cardioplegia,and warm blood cardioplegia(wBCP).The serum concentrations of the 24-h cTnI with wBCP(MD=−2.52,95%CI:−4.74 to−0.27)was significantly lower than cCCP.The serum concentrations of the 24-h cTnI with HTK(MD=4.91,95%CI:2.84–7.24)was significantly higher than cCCP.There was no significant difference in other biochemical and clinical outcomes when compared to cCCP.In conclusion,wBCP may have a superior myocardial protective effect with lower 24-h cTnI levels postoperatively and similar clinical outcomes after pediatric cardiac surgery.

急性心肌梗死短期预后与血清sST2、hs-cTnI水平的相关性

目的探究急性前壁心肌梗死(AAMI)短期预后与血清可溶性生长刺激表达基因2蛋白(sST2)、超敏肌钙蛋白I(hs-cTnI)水平的相关性。方法选取2021年5月—2022年4月上海交通大学医学院附属苏州九龙医院收治的AAMI患者124例,出院后随访12个月,根据随访期内是否发生主要不良心血管事件(MACE)将患者分为预后不良组48例和预后良好组76例。比较两组入院时血清sST2、hs-cTnI和脑钠肽(BNP)、高密度脂蛋白胆固醇(HDL-C)等基线资料,绘制受试者工作特性曲线(ROC)评价血清sST2、hs-cTnI水平预测AAMI患者短期预后的效能,采用多因素Logistic回归分析AAMI患者短期预后的独立危险因素。结果预后不良组Killips分级≥Ⅲ级、冠状动脉三支病变占比及BNP、sST2、hs-cTnI明显高于预后良好组(P<0.05),HDL-C明显低于预后良好组(P<0.05)。ROC曲线分析结果显示,sST2、hs-cTnI对AAMI患者短期预后均有一定预测效能,曲线下面积分别为0.893、0.801。多因素Logistic回归分析结果显示,Killips分级≥Ⅲ级、冠状动脉三支病变、BNP≥806.680 pg/mL、sST2≥132.00 pg/mL、hs-cTnI≥1.750μg/L是AAMI患者短期预后的独立危险因素(P<0.05),HDL-C<0.920 mmol/L是AAMI患者短期预后的独立保护因素(P<0.05)。结论sST2、hs-cTnI是潜在的预测AAMI患者短期预后的生物标记物,其血清水平升高与AAMI患者短期预后密切相关。

Physician-level variation in the diagnosis of myocardial infarction and the use of angiography among veterans with elevated troponin

Background:Cardiac troponin assays have improved the ability to detect myocardial damage.However,ascertaining whether troponin elevation is due to myocardial infarction(MI) or secondary to another process can be challenging.Our aim is to evaluate provider-level variation in the diagnosis of MI and the use of invasive coronary angiography(ICA) among patients with undifferentiated elevations in cardiac troponin.Methods:We analyzed data from all patients with elevated troponin levels in a single Veterans Affairs(VA) Medical Center between 2006 and 2007.One of several cardiologists prospectively evaluated each patient's presentation and course of care.We compared the frequency of MI diagnosis and ICA use between physicians using univariate odds ratios(OR).Results:Among 761 patients,34.0% were diagnosed with MI and 25.9% underwent ICA.The unadjusted rates of MI(23.9% to 56.7%,P=0.02) and ICA(17.3% to 73.3%,P<0.001) differed between physicians.Comparing the patient cohorts for each physician,baseline characteristics were similar except for chest pain.In multivariate regression,factors associated with the use of cardiac ICA included an abnormal electrocardiograph(ECG)(OR=1.89,P=0.014),level of troponin(OR=1.71,P=0.004),chest pain(OR=8.60,P<0.001),and care by non-VA physicians(OR=4.45,P=0.006).One physician had a lower ICA use(OR=0.56,P=0.017).In multivariate regression of MI,no physician-level variation was observed.Conclusion:Among patients with elevated troponin,the likelihood of being diagnosed with MI and undergoing ICA is dependent on their clinical presentation.After adjustment,physician-level variation in care was observed for the use of ICA,but not for the diagnosis of MI.

CysC、cTnI水平及心功能指标对AMI患者PCI术后短期预后的预测价值

目的 探讨胱抑素C(CysC)、心肌肌钙蛋白I(cTnI)水平及心功能指标对急性心肌梗死(AMI)患者经皮冠状动脉介入治疗(PCI)术后短期预后的预测价值。方法 选取2020年11月至2021年11月我院收治的120例接受PCI的AMI患者为研究对象,患者出院时检测CysC、cTnI水平及心功能指标,随访3个月后统计不良心血管事件发生情况并根据有无发生其情况分为预后良好组、预后不良组,比较两组基本资料、CysC、cTnI水平及心功能指标,分析以上指标对不良心血管事件危险因素及预测价值并绘制ROC曲线。结果 AMI患者PCI术后3个月不良心血管事件发生率为38.33%(46/120);预后不良组CysC、cTnI水平高于预后良好组,LVEF低于预后良好组(P<0.05);CysC、cTnI升高,LVEF降低是AMI患者PCI术后短期发生不良心血管事件的危险因素(P<0.05);CysC、cTnI水平及LVEF预测AMI患者PCI术后短期不良预后的AUC为0.606、0.743、0.743,具有一定预测价值,联合预测AUC为0.855,预测价值更高。结论 CysC、cTnI水平及LVEF对AMI患者PCI术后短期预后具有预测价值,CysC、cTnI升高,LVEF降低是AMI患者PCI术后发生不良心血管事件的危险因素。

心肌肌钙蛋白I、D-二聚体及其比值对急性心肌梗死与主动脉夹层的早期鉴别诊断价值

目的 探究心肌肌钙蛋白I(cTnI)、D-二聚体及其比值对急性心肌梗死(AMI)与主动脉夹层(AD)鉴别诊断的价值。方法 选取2017年1月至2022年3月郑州大学第五附属医院收治的115例急性心肌梗死患者(急性心肌梗死组)、78例主动脉夹层患者(主动脉夹层组)进行回顾性研究。比较入院后两组患者cTnI及D-二聚体水平,并通过受试者工作特征(ROC)曲线评估cTnI、D-二聚体及其比值对AMI与AD的鉴别诊断价值。结果 急性心肌梗死组患者cTnI水平高于主动脉夹层组,D-二聚体水平低于主动脉夹层组,差异有统计学意义(P<0.001)。ROC曲线显示,cTnI鉴别AMI与AD时,其曲线下面积(AUC)为0.916,最佳截断值为0.34μg·L^(-1),诊断灵敏度为89.6%,特异度为88.5%;D-二聚体鉴别AMI与AD时,AUC值为0.915,最佳截断值为1.15 mg·L^(-1),诊断灵敏度为87.2%,特异度为83.5%;cTnI与D-二聚体的比值联合鉴别AMI与AD的AUC值为0.985,最佳截断值为0.33,诊断灵敏度为93.9%,特异度为96.2%;cTnI、D-二聚体的数据拟合后联合鉴别诊断AMI与AD时,AUC值为0.983,诊断灵敏度为95.7%,特异度为96.2%。结论 cTnI与D-二聚体对于鉴别AMI与AD均具有较高的敏感度和特异度,而cTnI与D-二聚体的比值及二者联合检测对AMI与AD患者的鉴别诊断价值更高。

沙库巴曲缬沙坦片对慢性心功能不全患者血浆NT-proBNP、cTnI表达及心功能的影响

目的 观察沙库巴曲缬沙坦对慢性心功能不全患者氨基末端脑钠肽前体(NT-proBNP)、肌钙蛋白Ⅰ(cTnI)表达及心功能的影响。方法 选取2021年11月至2022年12月在首都医科大学附属北京友谊医院诊治的慢性心功能不全患者为研究对象,分为研究组(沙库巴曲缬沙坦片)和对照组(缬沙坦胶囊)。观察两组患者的总有效率、心功能指标[左心室射血分数(LVEF)、左心室收缩末期内径(LVESD)、左心室舒张末期内径(LEVDD)]、血浆NT-proBNP、cTnI、可溶性生长刺激表达基因2蛋白(sST2)、血管紧张素(AngⅡ)及不良反应发生率。结果研究共纳入100例心功能不全患者,研究组和对照组各50例。治疗后,研究组的总有效率高于对照组(P <0.05);研究组LVEF显著高于对照组,而LVESD、LEVDD显著低于对照组(P <0.05)。治疗后2组患者血浆NT-proBNP、cTnI、AngⅡ、sST2差异有统计学意义(P <0.05),治疗前后2组以上指标差异均有统计学意义(P <0.05)。两组不良反应的差异无统计学意义(P> 0.05)。结论 沙库巴曲缬沙坦片治疗慢性心功能不全患者,可改善患者心功能、预后、安全性较好。

血清BNP、CA125、hsTnI水平与慢性心力衰竭患者心脏自主神经功能的关系

目的探究血清脑钠肽(BNP)、糖类抗原125(CA125)、高敏心肌肌钙蛋白I(hsTnI)水平与慢性心力衰竭(CHF)患者心脏自主神经功能的关系。方法选取该院2019年3月至2021年6月收治的100例CHF患者作为观察组,另选取同期体检健康者60例作为对照组。比较两组临床资料、血清BNP、CA125、hsTnI水平,分析血清BNP、CA125、hsTnI水平与CHF的关系,比较血清BNP、CA125、hsTnI水平、心率变异性指标[NN间期标准差(SDNN)、NN间期平均值标准差(SDANN)、相邻NN间期差值的均方根(RMSSD)、相邻RR间期相差>50 ms的个数占总心跳次数的百分比(PNN50)]水平,分析血清BNP、CA125、hsTnI水平与心率变异性指标的相关性。绘制受试者工作特征(ROC)曲线并评价血清BNP、CA125、hsTnI水平、心率变异性指标对CHF患者预后的预测价值。结果两组性别、年龄、体重指数、吸烟占比、饮酒占比比较,差异无统计学意义(P>0.05);观察组血清BNP、CA125、hsTnI水平均高于对照组,差异有统计学意义(P<0.05)。Logistic回归分析显示,血清BNP、CA125、hsTnI水平为CHF发病独立影响因素(P<0.05)。预后不良患者血清BNP、CA125、hsTnI水平均高于预后良好患者,SDNN、SDANN、RMSSD、PNN50均低于预后良好患者,差异有统计学意义(P<0.05)。CHF患者血清BNP、CA125、hsTnI水平均与SDNN、SDANN、RMSSD、PNN50呈负相关(P<0.05)。血清指标联合心率变异性指标预测CHF患者预后的AUC为0.935,灵敏度为92.59%,特异度为84.93%,预测效能良好。血清BNP、CA125、hsTnI高水平患者存活率低于血清BNP、CA125、hsTnI低水平患者,差异有统计学意义(P<0.05)。结论CHF患者血清BNP、CA125、hsTnI水平明显升高,且其水平与心脏自主神经功能有关,可用于预测患者预后情况,为临床诊疗提供依据。