Prognostic value of N-terminal pro B-type natriuretic peptide and troponin Ⅰ in children with dengue shock syndrome

Objective:To investigate the contribution of N-terminal pro B-type natriuretic peptide(NT-pro BNP)and troponin Ⅰ to mortality in children with dengue shock syndrome.Methods:A longitudinal study was conducted on children with dengue shock syndrome in a hospital in southern Vietnam.Detailed clinical histories,physical examinations,and laboratory parameters,including NT-pro BNP and troponin Ⅰ,were recorded.A comparison between survival and non-survival was carried out to identify factors influencing mortality.Results:A total of 107 patients with a median age of 9 years were included in the study.Among them,63.6%(68/107)presented with compensated shock,36.4%(39/107)had hypotensive shock,23.4%(25/107)required mechanical ventilation,and 12.1%(13/107)died.The NT-pro BNP levels were 3.9 pmol/L(IQR:1.9,10.3)and 15.2 pmol/L(5.8,46.3),while the median high sensitivity troponin Ⅰ levels were 20 pg/L(6,95)and 62 pg/L(12,325)at the first and second measurements,respectively.The mortality group exhibited higher rates of hypotensive shock,prolonged shock,lactate levels,liver damage,NT-pro BNP,and troponin Ⅰ levels.Hypotensive shock(OR 12.96,95%CI 2.70-62.30,P=0.004),prolonged shock(OR 39.40,95%CI 6.68-232.70,P<0.001),AST>1000 IU/L(OR 9.50,95%CI 2.63-34.34,P=0.041),and NT-pro BNP>7 pmol/L(OR 44.40,95%CI 5.44-362.20,P=0.001)were identified as predictive factors for mortality in dengue shock syndrome.Conclusions:The NT-pro BNP level could serve as a potential biomarker for predicting mortality in children with dengue shock syndrome.

胸痛发作时床边即时检测心肌钙蛋白T诊断急性心肌梗死的价值

目的确定胸痛症状发作后不同时间间隔内,床边心肌肌钙蛋白T(point of care troponin-T testing,POCT-cTnT)对急性心肌梗死(acute myocardial infarction,AMI)的诊断性能,了解其在快速排除AMI方面的意义。方法这项回顾性研究包括了2019年1月至2022年12月期间出现胸痛症状的6024例患者。在入院时测量了POCT-cTnT和中心实验室cTnI水平。通过按时间窗口划分的受试者工作特征(receiver operating characteristics,ROC)分析,评估POCT-cTnT在诊断AMI时的准确性。结果总体而言,POCT-cTnT诊断AMI的AUC为0.826(95%CI:0.816~0.836),灵敏度和特异度分别为72.81%和86.26%。根据胸痛发作的时间进行区间分组(<3 h、3~6 h、6~12 h、12~24 h、24~72 h和≥72 h),6~12 h以后的分组AUC值分别为0.918、0.928、0.920和0.908,差异无统计学意义(P>0.05),均要高于6 h时以内的组(P<0.001);根据胸痛发作时间点进行分组,≥8 h组的AUC为0.921,阴性预测值(negative predictive value,NPV)98.1%和阴性似然比(negative likelihood ratio,-LR)0.11,其AUC高于≥3 h、≥2 h、≥1 h和overall组(P<0.05),而与≥4 h以后的各时间组相比,差异无统计学意义(P>0.05)。结论胸痛发作时间对单次检测POCT-cTnT诊断AMI的性能存在一定的影响,结合胸痛发作至就诊时间,可能提高其诊断或排除AMI的可靠性。在胸痛发作4 h后,单次POCT-cTnT检测能可靠地诊断或排除AMI;当胸痛发作8 h后,其诊断或排除AMI方面具有更高的可靠性。

COPD急性加重期患者外周血单个核细胞SOCS-1、TLR4 mRNA及血清cTnT、尿酸水平变化分析

目的探讨慢性阻塞性肺疾病(COPD)急性加重期患者外周血单个核细胞中细胞因子信号抑制蛋白-1(SOCS-1)、Toll样受体4(TLR4)mRNA水平及血清心肌肌钙蛋白T(cTnT)、尿酸水平变化。方法收集COPD急性加重期(组)患者70例,COPD稳定期(组)患者40例,对照组健康志愿者40名。检测外周血单个核细胞SOCS-1、TLR4 mRNA水平及血清cTnT、尿酸浓度;行肺功能检查并记录相关指标(FEV1、FEV1%、FEV1/FVC%)。对COPD急性加重期患者进行1 a随访,分为预后不良组和预后良好组。对外周血单个核细胞SOCS-1、TLR4 mRNA水平、血清cTnT、尿酸浓度行Pearson相关性分析,并对COPD急性加重期患者预后评估价值进行ROC曲线分析。结果COPD急性加重期组SOCS-1 mRNA表达水平明显低于COPD稳定期组、对照组,TLR4 mRNA水平及血清cTnT、尿酸浓度明显高于COPD稳定期组和对照组(均P<0.01)。COPD急性加重期组FEV1、FEV1%、FEV1/FVC%明显低于COPD稳定期组和对照组(P<0.05)。COPD急性加重期患者FEV1/FVC%与外周血单个核细胞SOCS-1 mRNA表达水平呈正相关关系(P<0.01),与外周血单个核细胞TLR4 mRNA水平及血清cTnT、尿酸浓度呈负相关关系(P<0.01)。预后不良组SOCS-1 mRNA水平明显低于预后良好组,TLR4 mRNA水平及血清cTnT、尿酸浓度明显高于预后良好组(P<0.05)。外周血单个核细胞SOCS-1、TLR4 mRNA水平及血清cTnT、尿酸联合检测对COPD急性加重期患者预后具有较高的评估价值。结论COPD急性加重期患者SOCS-1低表达,TLR4、cTnT、尿酸高表达,且与肺功能水平密切相关,联合检测对患者预后具有较高的评估价值。

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。

婴儿心脏术后肌钙蛋白T水平对机械通气时间延长的影响

目的探讨肌钙蛋白T对婴儿心脏术后机械通气时间延长的影响。方法回顾性选取2019年1月至4月在南方医科大学附属广东省人民医院心外科行体外循环下心内直视术的192例先天性心脏病婴儿,按术后即刻肌钙蛋白T水平分为肌钙蛋白T高值组(3798.0~10000.0 ng/L)、中值组(1827.0~3709.0 ng/L)和低值组(316.2~1801.0 ng/L),各64例。低值组中,女28例,男36例,日龄203.00(129.75,274.50)d;中值组中,女30例,男34例,日龄118.00(76.50,173.75)d;高值组中,女24例,男40例,日龄168.50(78.00,219.25)d。采用方差分析、秩和检验、χ^(2)检验进行统计分析,通过单因素和多因素logistic回归模型分析术后肌钙蛋白T水平与术后机械通气时间延长的相关性,通过单因素和多因素线性回归模型分析术后肌钙蛋白T水平与重症监护停留时间及术后住院天数的相关性。结果术前日龄越小、手术体外循环时间越长、主动脉阻断时间越长,术后肌钙蛋白T水平越高(均P<0.05)。在校正了性别、日龄、胎龄、术前血红蛋白、术前血清肌酐、体外循环时间、主动脉阻断时间、先天性心脏病手术风险调整评分(RACHS-1)等因素后,多因素回归模型发现,肌钙蛋白T水平升高是机械通气时间延长的独立危险因素[OR=1.2(1.1,1.3),P<0.001]。结论肌钙蛋白T水平升高与婴儿先天性心脏病术后机械通气时间延长有关。

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.

High-sensitivity cardiac troponins in everyday clinical practice

High-sensitivity cardiac troponin(hs-cTn) assays are increasingly being used in many countries worldwide,however,a generally accepted definition of high-sen-sitivity is still pending.These assays enable cTn mea-surement with a high degree of analytical sensitivity with a low analytical imprecision at the low measuring range of cTn assays(coefficient of variation of < 10% at the 99th percentile upper reference limit).One of the most important advantages of these new assays is that they allow novel,more rapid approaches to rule in or rule out acute coronary syndromes(ACSs) than with previous cTn assay generations which are still more commonly used in practice worldwide.hs-cTn is also more sensitive for the detection of myocardial damage unrelated to acute myocardial ischemia.Therefore,the increase in early diagnostic sensitivity of hs-cTn assays for ACS comes at the cost of a reduced ACS specificity,because more patients with other causes of acute or chronic myocardial injury without overt myocardial isch-emia are detected than with previous cTn assays.As hs-cTn assays are increasingly being adopted in clinical practice and more hs-cTn assays are being developed,this review attempts to synthesize the available clinical data to make recommendations for their everyday clini-cal routine use.

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.

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

Objective To study prognostic characteristics of cardiac troponin I （cTnI） elevation in acute ischemic stroke. Methods We retrospectively studied patients （n = 248） with acute ischemic stroke, acute ST-segment elevation myocardial infarction, and acute non-ST-elevation myocardial infarction who were treated between January 2013 and October 2015. Baseline demographic data and changes in cTnI levels among these three groups were compared. Patients with acute ischemic stroke were assigned to either the cTnI elevation group （cTnI 〉 0.034 ng/mL） or the no cTnI elevation group （cTnI ≤ 0.034 ng/mL）. Logistic regression analysis was used to identify risk factors associated with elevated serum cTnI in patients with acute ischemic stroke. Moreover, the duration of hospital stay and incidence of major cardiovascular outcomes were compared in patients with acute ischemic stroke, with or without elevated cTnI. Results In this study population of patients with acute ischemic stroke （n = 178）, acute ST-segment elevation myocardial infarction （n = 35）, and acute non-ST-elevation myocardial infarction （n = 35）, patients with acute ischemic stroke with elevated cTnI comprised 18.54% of subjects. Patients with elevated cTnI were older and more likely to have a history of hypertension. In addition, these patients had higher levels of inflammatory markers, reduced renal functions, increased D-dimer levels, higher NIH stroke scores, and lower left ventricular ejection fractions. Logistic regression analysis showed that both percentage of neutrophil and NIH stroke scores were elevated; estimated glomerular filtration rate and left ventricular ejection fraction were decreased in patients with acute ischemic stroke who had elevated cTnI, and they had more frequent major cardiovascular events during hospital stay. Conclusion Elevated cTnI detected in patients with acute ischemic stroke, indicated a greater likelihood of poor short-term prognosis during hospital stay.

Prognostic value of high-sensitivity cardiac troponin T in patients with en-domyocardial-biopsy proven cardiac amyloidosis

Objective To investigate prognostic predictors of long-term survival of patients with cardiac amyloidosis （CA）, and to determine predictive value of high-sensitivity cardiac troponin T （hs-cTnT） in CA patients. Methods We recruited 102 consecutive CA cases and followed these patients for 5 years. We described their clinical characteristics at presentation and used a new, high-sensitivity assay to determine the concentration of cTnT in plasma samples from these patients. Results The patients with poor prognosis showed older age （56 ±12 years vs. 50 ±15 years, P=0.022）, higher incidences of heart failure （36.92%vs. 16.22%, P=0.041）, pericardial effusion （60.00%vs. 35.14%, P=0.023）, greater thickness of interventricular septum （IVS） （15 ±4 mm vs. 13 ±4 mm, P=0.034）, higher level of hs-cTnT （0.186 ±0.249 ng/mL vs. 0.044 ±0.055 ng/mL, P=0.001） and higher NT-proBNP （N-terminal pro-B-type natriuretic pep-tide） levels （11,742 ± 10,464 pg/mL vs. 6,031 ± 7,458 pg/mL, P=0.006）. At multivariate Cox regression analysis, heart failure （HR：1.78, 95%CI：1.09-2.92, P=0.021）, greater wall thickness of IVS （HR：1.44, 95%CI：1.04-3.01, P=0.0375） and higher hs-cTnT level （HR：6.16, 95%CI：2.20-17.24, P=0.001） at enrollment emerged as independent predictors of all-cause mortality. Conclusions We showed that hs-cTnT is associated with a very ominous prognosis, and it is also the strongest predictor of all-cause mortality in multivariate analysis. Examination of hs-cTnT concentrations provides valuable prognostic information concerning long-term outcomes.

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.

血清脑钠肽、心肌肌钙蛋白T及休克指数与急性心肌梗死患者经皮冠脉介入术后主要不良心血管事件的相关性分析

目的 探讨血清脑钠肽(BNP)、心肌肌钙蛋白T(c Tn T)及休克指数(SI)与急性心肌梗死(AMI)患者经皮冠脉介入术(PCI)后主要不良心血管事件(MACE)的相关性。方法 回顾性分析2017年11月至2022年11月于徐州医科大学附属医院、江苏省滨海县人民医院进行PCI治疗的200例AMI患者的临床资料,将其分为MACE组(60例)与无MACE组(140例)。比较两组基线资料、血管狭窄程度(Gensini)评分、总胆固醇(TC)、甘油三酯(TG)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)及术前白蛋白、BNP、c Tn T、SI。采用logistic逐步回归分析MACE的危险因素,通过受试者工作特征(ROC)曲线分析各指标预测MACE的价值。结果 MACE组糖尿病患者占比及年龄、BNP、c Tn T、SI水平高于无MACE组(P<0.05)。logistic逐步回归分析结果显示,年龄(OR=2.145,95%CI=1.056~4.357)、BNP (OR=1.985,95%CI=1.156~3.408)、c Tn T (OR=1.997,95%CI=1.145~3.483)、SI(OR=1.897,95%CI=1.260~3.196)是AMI患者PCI治疗后MACE发生的危险因素(P<0.05)。ROC曲线分析结果显示,年龄、BNP、c Tn T、SI均可用于预测AMI患者PCI治疗后MACE的发生(P<0.05)。结论 年龄、BNP、c Tn T、SI可影响AMI患者PCI治疗后MACE的发生,可用于预测MACE的发生。

血清cTnT、NT-proBNP峰值评估急性心肌梗死后梗死面积及1年不良预后的临床价值

目的探讨肌钙蛋白T(cTnT)峰值联合氨基末端B型利钠肽前体(NT-proBNP)峰值评估急性心肌梗死(AMI)后梗死面积(IS)及1年不良事件的临床价值。方法回顾性分析2016年1月至2021年7月于上海市静安区中心医院就诊的AMI患者150例。每日检测cTnT及NT-proBNP至峰值出现,心脏磁共振评估IS,随访1年不良事件。logistic回归分析IS及不良事件发生的风险因素,ROC曲线分析cTnT、NTproBNP峰值的预后价值。结果共纳入49例患者,根据不良事件发生分为事件组(n=19)和无事件组(n=30),根据中位IS值分为IS≥18.26%组(n=25)和<18.26%组(n=24)。事件组IS、cTnT、NT-proBNP明显高于无事件组,差异有统计学意义(P<0.05)。IS≥18.26%组cTnT、NT-proBNP显著高于IS<18.26%组,不良事件发生有统计学意义(P<0.05)。ROC曲线显示cTnT峰值联合NT-proBNP峰值预测AMI预后效果最好,AUC为0.935,两指标联合预测IS的AUC为0.883。结论血清cTnT、NT-proBNP峰值能反映AMI心肌IS大小,具预后价值,两者联合效果更优。

血Fib、TNI、TnT及Lp-PLA2与急性心肌梗死预后的相关性分析

目的 探讨血纤维蛋白原(Fib)、肌钙蛋白I(TNI)、肌钙蛋白T(TnT)及脂蛋白相关磷脂酶A2(Lp-PLA2)与急性心肌梗死(AMI)预后的相关性。方法 选取2020至2021年诊治的AMI患者122例作为研究组,入院后第3个月按照发生不良心血管事件(MACE)将AMI患者分为预后不良组(发生MACE)39例和预后良好组(未发生MACE)83例,并选取同期体检的健康志愿者40例作为对照组。比较研究组与对照组、预后不良组和预后良好组的血Fib、TNI、TnT及Lp-PLA2水平,并分析血Fib、TNI、TnT及Lp-PLA2对AMI患者预后不良的预测价值。结果 研究组血Fib、TNI、TnT、Lp-PLA2明显高于对照组(P<0.05)。预后不良组血Fib、TNI、TnT、Lp-PLA2明显高于预后良好组(P<0.05)。受试者工作特征(ROC)曲线分析显示,Fib、TNI、TnT、Lp-PLA2、四者联合预测AMI患者预后不良的曲线下面积(AUC)分别为0.826、0.816、0.878,0.947、0.947,在最佳临界值对应的敏感度、特异度分别为:Fib为56.4%、100%,TNI为51.3%、100%,TnT为51.3%、100%,Lp-PLA2为76.9%、84.3%,四者联合为82.1%、100%。结论 AMI患者血Fib、TNI、TnT及Lp-PLA2水平呈高表达,且预后不良血Fib、TNI、TnT及Lp-PLA2水平越高;血Fib、TNI、TnT及Lp-PLA2四者联合对AMI患者预后不良具有较高的预测价值。

入院时血清高敏肌钙蛋白T水平对老年轻中度脑梗死患者长期认知功能的影响

目的 探讨入院时血清高敏肌钙蛋白T(high sensitive cardiac troponin T,hs-cTnT)与老年轻中度脑梗死患者长期认知功能的关系。方法 前瞻性纳入2020年2月至11月濮阳市人民医院住院治疗的轻、中度脑梗死患者207例,根据入院时血清hs-cTnT在脑梗死患者中的分布水平,将患者分为高水平组102例(hs-cTnT>12 ng/L),低水平组105例(hs-cTnT≤12 ng/L)。随访3年,190例脑梗死患者成功随访,高水平组94例,低水平组96例。分析2组患者一般资料、简易智能状态检查量表(mini-mental status examination, MMSE)评分,应用logisitic回归分析影响患者出院时和出院3年后的认知功能影响因素,ROC曲线分析入院时hs-cTnT水平预测脑梗死患者出院3年后发生认知功能障碍的价值。结果 2组出院3年后MMSE评分均高于出院时,发生认知功能障碍比例均低于出院时(P<0.01)。高水平组出院时、出院3年后MMSE评分均显著低于低水平组,发生认知功能障碍比例均显著高于低水平组(P<0.01)。logisitic回归分析显示,女性、入院时hs-cTnT高水平、谵妄持续时间>1 d是脑梗死患者出院时发生认知功能障碍的危险因素(P<0.05,P<0.01),文化程度大专及以上是脑梗死患者出院时发生认知功能障碍的保护因素(P<0.05);年龄、女性、出院时存在认知功能障碍、入院时hs-cTnT高水平是脑梗死患者出院3年后发生认知功能障碍的危险因素(P<0.05,P<0.01)。ROC曲线分析显示,入院时hs-cTnT水平预测脑梗死患者出院3年后发生认知功能障碍的曲线下面积为0.732(95%CI:0.531~0.927)。结论 入院时高水平hs-cTnT是老年轻中度脑梗死患者出院时和出院3年后发生认知功能障碍的危险因素,可帮助预测患者长期认知功能。

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。

三七对下腔静脉结扎DVT大鼠模型D-二聚体、cTn-I、BNP的影响

目的观察三七对下腔静脉结扎深静脉血栓(DVT)大鼠D-二聚体、心肌肌钙蛋白I(cTn-I)、血B型钠尿肽(BNP)的影响。方法将20只大鼠随机分为三七组、DVT组、依诺肝素组和假手术组,每组各5只。除假手术组外均行开腹结扎下腔静脉造模。下腔静脉结扎造模成功后48 h处死大鼠,取游离左肾静脉和下腔静脉汇合处及向下1 cm血管进行苏木素-伊红染色,于显微镜下观察,并检测血管D-二聚体、cTn-I、BNP含量。结果四组大鼠血浆cTn-I、D-二聚体、BNP含量比较,差异均有统计学意义(F分别=26.56、9.86、7.34,P均<0.05)。DVT组大鼠血浆中cTn-I、D-二聚体、BNP含量高于假手术组,差异有统计学意义(t分别=11.40、6.67、8.92,P均<0.05)。三七组、依诺肝素组cTn-I含量明显低于DVT组,差异均有统计学意义(t分别=2.62、3.50,P均<0.05)。依诺肝素组D-二聚体含量明显低于DVT组,差异有统计学意义(t=3.66,P<0.05)。结论三七和依诺肝素对于DVT大鼠模型均有一定治疗作用。

2018-2023年重庆市肌钙蛋白POCT室间质量评价结果分析

目的分析2018-2023年重庆市肌钙蛋白即时检测(POCT)室间质量评价(EQA)结果,了解重庆市肌钙蛋白POCT检测现状,为提高重庆市肌钙蛋白POCT检测能力提供依据。方法收集2018-2023年参加重庆市临床检验中心肌钙蛋白POCT EQA实验室结果,并进行统计分析。结果2018-2023年参加重庆市肌钙蛋白POCT EQA的实验室数从36家增加至88家,所使用的仪器品牌分组数从无增加至8个,每批次实验室合格率从最低26.32%增加至最高89.77%,但仍存在各仪器品牌分组靶值差异较大的现象,2023年各批号分组靶值的变异系数为44.72%~105.69%。结论重庆市肌钙蛋白POCT EQA参加率和检测水平尚有待提高,需持续将肌钙蛋白POCT纳入EQA计划,以定期监测全市范围内该项目的检测质量,为临床诊疗提供快速、可靠的保障。

An electrochemiluminescent magneto-immunosensor for ultrasensitive detection of hs-cTnI on a microfluidic chip

Sensitive detection and precise quantitation of trace-level crucial biomarkers in a complex sample matrix has become an important area of research.For example,the detection of high-sensitivity cardiac troponin I(hs-cTnI)is strongly recommended in clinical guidelines for early diagnosis of acute myocardial infarction.Based on the use of an electrode modified by single-walled carbon nanotubes(SWCNTs)and a Ru(bpy)32+-doped silica nanoparticle(Ru@SiO2)/tripropylamine(TPA)system,a novel type of electrochemiluminescent(ECL)magneto-immunosensor is developed for ultrasensitive detection of hs-cTnI.In this approach,a large amount of[Ru(bpy)3]2+is loaded in SiO2(silica nanoparticles)as luminophores with high luminescent efficiency and SWCNTs as electrode surface modification material with excellent elec-trooxidation ability for TPA.Subsequently,a hierarchical micropillar array of microstructures is fabricated with a magnet placed at each end to efficiently confine a single layer of immunomagnetic microbeads on the surface of the electrode and enable 7.5-fold signal enhancement.In particular,the use of transparent SWCNTs to modify a transparent ITO electrode provides a two-order-of-magnitude ECL signal amplifi-cation.A good linear calibration curve is developed for hs-cTnI concentrations over a wide range from 10 fg/ml to 10 ng/ml,with the limit of detection calculated as 8.720 fg/ml(S/N 3).This ultrasensitive immunosensor exhibits superior detection performance with remarkable sta-=bility,reproducibility,and selectivity.Satisfactory recoveries are obtained in the detection of hs-cTnI in human serum,providing a potential analysis protocol for clinical applications.

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.