老年重度脓毒症合并心肌抑制患者心肌损伤标记物变化及价值

目的探讨老年重度脓毒症合并心肌抑制患者心肌损伤标记物肌钙蛋白I、T(cTnI、cTnT)、肌酸激酶(CK)、肌酸激酶同工酶(CK—MB)变化及其判断预后的价值。方法43例老年重度脓毒症患者确诊后次日进行血浆心肌损伤标记物检测，连续3日行心脏超声监测其心功能，确定患者是否并发心肌抑制，比较两组心肌损伤标记物水平，并通过ROC曲线下面积比较心肌损伤标记物预测心肌抑制及不良预后的价值。结果并发心肌抑制者的血浆CK—MB、cTnI、cTnT水平明显升高，cTnI、cTnT预测心肌抑制的价值高于CK—MB。cTnI阳性患者死亡率高但无显著性差异。结论肌钙蛋白检测对预测老年脓毒症患者有无心肌抑制有较高价值，对不良预后无明显预测价值。     

血清肌钙蛋白T及I对急性心肌梗死早期诊断的临床价值

目的 :观察急性心肌梗死 (AMI)患者入院前后血清肌钙蛋白T(cTnT)、肌钙蛋白I(cTnI)的变化 ,探讨cTnT、cTnI对早期诊断AMI的价值。方法 :对 10 0例患者 (AMI 5 0例、不稳定型心绞痛 5 0例 )和 2 0例健康人进行了血清cTnT、cTnI、肌酸激酶 (CK)和肌酸激酶同工酶 (CK MB)检测。结果 :①血清cTnT、cTnI、CK和CK MB检测AMI的敏感度和特异度分别为 80 %和 90 %、85 %和 92 %、92 %和 6 1%、75 %和 75 %。②AMI患者血清cTnT、cTnI浓度平均升高 (17.5± 5 .7)和 (16 .2± 4 .8)倍 ,显著高于CK(7.6± 3.1)倍、CK MB (6 .5± 2 .9)倍 (P <0 .0 1) ;③AMI后 3h内cTnT、cTnI阳性检出率为 5 0 .0 %、4 0 .0 % ,明显高于CK MB(2 4 .0 % )和CK(2 0 .0 % ) ;AMI 5d后cTnT、cTnI阳性检出率为 70 .0 %、6 6 .0 % ,而CK MB和CK仅为 4 .0 %和 8.0 %。结论 :血清cTnT、cTnI能早期确切诊断AMI ,具有较宽的时间诊断窗口 ,是心肌梗死早期诊断较敏感和特异的血清标志物     

肌钙蛋白I对急性心肌梗死近期预后的评价

血清酶学测定作为急性心肌梗死(AMI)诊断已有多年,尤其是 CK 及 CK MB 被认为是诊断AMI的重要指标,但它们存在特异性较低、升高持续时间短等缺点。近年来,许多研究已证实血清心脏肌钙蛋白(cTnI)比血清肌酸磷酸激酶(CK)及肌酸磷酸激酶同功酶(CK MB)检测对心肌损伤的诊断具有更高的特异性[1]。目前, cTnI 试纸条的应用使 cTnI 快速检测已成为可行。本文测定AMI患者cTnI快速检测及 CK MB 水平,进行两者比较,以探讨 cTnI在AMI中的诊断及近期预后的疗效价值。对象和方法病例选择　我院内科住院并经确诊为 AMI 患者22例(男18…     

心肌型脂肪酸结合蛋白在急性心肌梗死早期诊断中的应用

目的　评定脂肪酸结合蛋白 (H FABP)在急性心肌梗死 (AMI)早期诊断中的应用。　方法　采用自行开发的H FABP酶联免疫吸附试验一步夹心法对 12 6名健康体检者和 5 3例AMI患者血清H FABP进行检测 ,同时测定肌红蛋白 (MYO)、肌酸激酶同工酶 (CK MB)、肌钙蛋白I(cTnI) ,并对AMI进行动态观察 ,对早期诊断的敏感性、特异性、时效性等进行分析。　结果　H FABP在AMI后 (1 84± 0 6 4 )h血浆浓度即开始升高 ,比CK MB、cTnI早 (P <0 0 1) ;时间浓度动态曲线与MYO相似 ,与CK MB、cTnI相比曲线前移。AMI后 2h的敏感性和特异性分别为 76 4 7%、80 4 1% ;4h的敏感性和特异性分别为 89 16 %、91 2 6 %。　结论　AMI后 2、4hH FABP检测对AMI早期诊断具有较高的敏感性和特异性 ,可望成为重要的早期和排除诊断的血清心肌标志物的手段之一。     

肌红蛋白、肌钙蛋白T、肌酸激酶同工酶的检测对老年急性心肌梗死溶栓再通的判定价值

目的　探讨血清肌红蛋白 (Mb)、肌钙蛋白T(cTnT)和肌酸激酶同工酶 (CK MB)对老年急性心肌梗死溶栓疗效的早期判定价值。方法　应用酶联免疫分析法测定 32例老年急性心肌梗死患者溶栓治疗后的Mb、cTnT、CK MB浓度 ,分析急性心肌梗死患者溶栓再通组 ( 1 8例 )和溶栓未通组 ( 1 4例 )上述指标的变化。结果　急性心肌梗死溶栓再通组Mb、cTnT和CK MB达到峰值浓度的时间明显较未通组提前 ( P <0 .0 5) ,其中Mb较cTnT和CK MB峰值出现更早 ,分别为( 7.4± 2 .5)h、( 1 3.7± 4.1 )h和 ( 1 4.4± 2 .7)h (P <0 .0 1 ) ;Mb的诊断敏感性 ( 79% )与诊断效率( 87% )明显高于cTnT( 6 0 %、75% )和CK MB( 47%、6 7% ) (P <0 .0 1 )。结论　血清Mb、cTnT和CK MB水平及其变化可以较好地早期预测急性心肌梗死患者溶栓再通 ,其中Mb较cTnT及CK MB具有更好的的临床价值。     

床边快检肌钙蛋白Ⅰ和肌红蛋白在急性心肌梗塞早期诊断中的应用

目的:探讨床边快检心肌肌钙蛋白I(cTnI)、肌红蛋白(Mb)在急性心肌梗塞(AMI)早期诊断中的应用以及二项之间的相互关系。方法:选择96例疑似ACS患者的血液标本,在不同时段,同时进行cTnI和Mb的测定。结果:在确诊的87例AMI早期诊断中,cTnI阳性出现滞后,3h内测定的阳性率为16.1%,显著低于Mb的阳性率(72.4%),P<0.01;24h内测定cTnI的阳性率为100%。结论:在急诊科床边快检cTnI与Mb对AMI的早期诊断非常必要,可起到优势互补的作用。     

常温不停跳心内直视手术后不同时间心肌损伤标志物水平对预后的预测价值

目的　探讨常温不停跳心内直视手术后心肌损伤标志物的动态变化及其对预后的预测价值。方法　选择 4 8例择期二尖瓣置换术病人 ,分别于术前、术后即刻、术后 12h、2 4h及 4 8h等时点取静脉血检测C反应蛋白(CRP)、肌酸激酶同工酶 (CK MB)、肌钙蛋白T(cTnT)、肌钙蛋白I(cTnI)浓度变化 ,同时记录心电图 (ECG)、血流动力学指标及不良事件发生情况。结果　术前所有患者血浆CRP、CK MB、cTnT、cTnI均在正常范围 ,术后即刻上述指标明显升高 (P <0 0 5or 0 0 1) ,术后 12h达峰值 ;12例患者术后 4 8hCRP、CK MB、cTnT、cTnI仍显著高于正常 ,其中 2例死亡 ,7例发生术后低心排和 /或严重心律失常 ,3例发生一过性心律失常 :术后 12hcTnI>10 0 0 μg/L组与cTnI <10 0 0μg/L组严重不良事件发生率分别为 6 6 7%和 12 1%。 结论　常温不停跳心内直视手术后心肌损伤早期标志物明显升高 ,术后 4 8h仍未恢复正常或术后 12hcTnI超过 10 0 0μg/L提示预后不佳。     

心肌型脂肪酸结合蛋白(H-FABP)与cTnI、CK-MB组合在诊断早期AMI中的比较

目的研究血清心肌型脂肪酸结合蛋白（H—FABP）在早期急性心肌梗死（AMI）诊断中的价值,比较不同心肌损伤标志物组合诊断早期AMI的价值。方法选择疑似急性冠脉综合征患者102例,采用酶联免疫吸附法（Elisa）测定AMI患者发病1h、2h、3h、4～6h、7～12h时血清H—FABP浓度变化,并与心肌肌钙蛋白I（cTnI）、肌酸激酶同工酶（CK—MB）的检测结果进行比较,分析3种心肌损伤标志物及不同心肌标志物组合H—FABP＋cTnI与H—FABP＋CK—MB在诊断不同发病时间段AMI的敏感性和特异性。结果①在AMI发病3h内,H—FABP的诊断敏感性（66．7％）优于cTnI（0％）和CK—MB（0％）,差异有统计学意义（P〈0．05）。在AMI发病4～6h内,H—FABP的敏感性（94．4％）仍高于cTnI（61．1％）和CK—MB（50％）,差异有统计学意义（P〈0．05）。②H—FABP＋cTnI组合对AMI的诊断敏感度最高（95．8％）,特异度亦最高（100％）。H-FABP＋cTnI组合次之,分别为93．75％和97．2％。这两种组合对AMI的诊断敏感度与单个H—FABP、cTnI和CK—MB比较,差异有统计学意义（P〈0．05）,诊断特异度亦明显升高。结论在AMI发病6h内,H—FABP是最为敏感的心脏标志物,尤以发病3h内最敏感。H—FABP与不同心肌损伤标志物cTnI和CK—MB的组合均具有较高的敏感性和特异性,可提高早期诊断AMI的准确率。     

心肌酶谱和肌钙蛋白Ⅰ联合检测的诊断价值

目的观察心肌酶谱（AST、LDH、CK、CK—MB、HBDH）和肌钙蛋白I（cTnI）联合检测在急性心肌梗死（AMI）早期的临床诊断价值。方法对2010年9月至2011年3月来我院就诊的105例经确诊（符合WHO制定的诊断标准）的AMI患者进行心肌酶谱和cTnI联合检测,观察其对早期AMI诊断的特异性和敏感性。结果105例经确诊的AMI患者中,93例心肌酶改变,敏感性为88．6％;100例出现cTnI升高,敏感性为95．2％。100名健康对照者中,11例心肌酶发生改变,特异性为89％;1例cTnI升高,特异性为99％。结论心肌酶谱和cTnI联合检测在AMI早期的临床诊断中有重要价值。     

床边快速肌钙蛋白T测定对急性胸痛患者诊断的价值

目的评价床边快速心肌肌钙蛋白T(cTnT)检测对以急性胸痛症状住院或转科的患者诊断的价值。方法采用床边快速心肌肌钙蛋白T测定仪(CARDIACREADER)测定502例以急性胸痛症状入院或转入心内科的患者入院即刻、6h、12h的cTnT水平,同时测定患者的心肌肌钙蛋白I(cTnI)、肌酸磷酸激酶(CK)及其同功酶(CK-MB)水平。以心电图出现急性心肌梗死(AMI)的动态改变和(或)CK-MB和TnI同时升高诊断为心肌梗死,计算床边快速cTnT诊断急性心肌梗死的特异性、敏感性、阴性预测价值和阳性预测价值。结果502例急性胸痛患者,cTnT阳性160例(31.9%),cTnT阴性323例(64.3%),19例弱阳性。139例cTnT阳性患者发生AMI,7例cTnT阴性的患者发生AMI。床边快速cTnT对以急性胸痛症状住院或转科的患者诊断AMI的特异性为93.8%、敏感性为95.2%、阳性预测价值为86.9%、阴性预测价值为97.8%。结论床边快速肌钙蛋白T测定可以迅速准确地在急性胸痛患者中识别或排除AMI患者,具有重要的诊断价值。     

心脏肌钙蛋白I诊断急性心肌梗死的价值

目的 :探讨血清心脏肌钙蛋白 I（c Tn I）在急性心肌梗死 （AMI）中的诊断价值。方法 :急性心肌梗死 （AMI）组患者 2 0例 ,不稳定型心绞痛 （U A）组 31例 ,陈旧性心肌梗死 （OMI）组 11例 ,危重病患者 87例 （非心血管疾病 ）。AMI组患者系列采血测定血清 c Tn I和 CK- MB,U A与 OMI组、危重患者组均入院后次日晨取血 1次。结果 :c Tn I与CK- MB诊断 AMI的敏感性均为 10 0 % ,c Tn I诊断 AMI的特异性高于 CK- MB（P<0 .0 5 ） ;AMI时 c Tn I浓度高峰时间与 CK- MB平行 ,持续时间明显延长 （P<0 .0 1） ,溶栓患者高峰时间明显前移 （P<0 .0 1）。结论 :c Tn I诊断 AMI敏感性高 ,其特异性高于 CK- MB。且在血清中出现早且持续时间长。其峰值时间改变可用于判定 AMI的溶栓疗效     

Usefulness of rapid bedside cardiac troponin T assay for the diagnosis of acute myocardial infarction

Cardiac troponin T(cTnT) is one of the most myocardial-specific markers for the diagnosis of acute myocardial infarction(AMI). Recently, the rapid bedside cTnT assay(Trop T rapid assay sensitive version), which can provide qualitative determinations within 15 min, has been developed for the emergency clinical setting. To evaluate the usefulness of rapid bedside cTnT assay, we performed the Trop T test and measured serum levels of myoglobin(Mb), creatine kinase MB isoenzyme(CK-MB) and cTnT in 256 consecutive emergency patients with suspected AMI(65 found to have AMI and 191 without AMI). The diagnostic sensitivities for AMI of Trop T, Mb and CK-MB measurements were 66%, 92% and 52%, respectively, whereas the specificities were 80%, 18% and 74%, respectively. The diagnostic accuracy for AMI of Trop T(77%) was significantly higher than that of Mb(37%, p < 0.001) and CK-MB(69%, p < 0.05). The sensitivity for AMI of Mb(86%) was significantly(p < 0.001) higher than that of Trop T (31%) and CK-MB(31%) in patients admitted < or = 3 hr after the onset of AMI. In contrast, the sensitivities of Trop T(80% and 100%) in patients admitted at 3-6 hr and > 6 hr showed no significant differences from those of Mb(100% and 96%). Furthermore, Trop T in patients admitted > 6 hr had significantly(p < 0.01) higher sensitivity compared with CK-MB(69%). The mortality rate in the non-AMI group during hospitalization in patients with positive Trop T test(39%) was significantly(p < 0.001) higher than that in patients with negative test(9%). When the positive Trop T test was regarded as > or = 0.10 ng/ml of serum cTnT, Trop T test had the best concordance of 92% with a quantitative of cTnT assay.     

Myoglobin, creatine-kinase-MB and cardiac troponin-I 60-minute ratios predict infarct-related artery patency after thrombolysis for acute myocardial infarction: results from the Thrombolysis in Myocardial Infarction study (TIMI) 10B.

OBJECTIVES: We examined the diagnostic performance of serum myoglobin, creatine-kinase-MB (CK-MB) and cardiac troponin-I (cTnI) for predicting the infarct-related artery (IRA) patency in patients receiving TNK-tissue plasminogen activator (TNK-tPA) therapy for acute myocardial infarction (AMI) in the Thrombolysis in Myocardial Infarction (TIMI) 10B trial. BACKGROUND: A reliable noninvasive serum marker of IRA patency is desired to permit early identification of patients with a patent IRA after thrombolysis. METHODS: We measured myoglobin, CK-MB and cTnI concentrations in sera obtained just before thrombolysis (T0) and 60 min later (T60) in 442 patients given TNK-tPA and who underwent coronary angiography at 60 min. RESULTS: Angiography at 60 min showed a patent IRA (TIMI flow grade 2, 3) in 344 and occluded IRA (TIMI flow grade 0, 1) in 98 patients. The median serum T60 concentration, the ratio of the T60 and T0 serum concentration (60-min ratio) and the slope of increase over 60 min for each serum marker were significantly higher in patients with patent arteries compared with patients with occluded arteries. The area under the receiver-operating characteristic (ROC) curve for diagnosis of occlusion was 0.71, 0.70 and 0.71 for the 60-min ratio of myoglobin, cTnI and CKMB, respectively. The 60-min ratios of > or =4.0 for myoglobin, > or =3.3 for CK-MB and > or =2.0 for cTnI yielded a probability of patency of 90%, 88% and 87%, respectively. CONCLUSIONS: The diagnostic performance of serum myoglobin, CK-MB and cardiac troponin-I (cTnI) 60-min ratios was similar. The probability of a patent IRA was very high (90%) in patients with 60-min myoglobin ratio > or =4.0, and early invasive interventions to establish IRA patency may not be necessary in this group. Serum marker determinations at baseline and 60-min after thrombolysis may permit rapid triage of patients receiving thrombolytic therapy by ruling out IRA occlusion.     

Comparison of Cardiac Troponin I versus T and Creatine Kinase MB after Coronary Artery Bypass Grafting in Patients with and without Perioperative Myocardial Infarction

BACKGROUND AND PURPOSE: Cardiac troponins have shown to be specific markers of myocardial injury. The aim of this prospective study was to compare patterns and kinetics of troponin I and T after coronary artery bypass grafting (CABG) with or without perioperative myocardial infarction (PMI). PATIENTS AND METHODS: 119 patients (male/female: 96/23, age 64 +/- 10 years) underwent first time elective CABG. Preoperative mean ejection fraction was 55.8% +/- 15.6%. The mean number of grafts was 3.1 +/- 1.1/patient, in 85.7% the internal mammary artery was used. Cardiac troponin I (cTnI) and T (cTnT) levels, total serum activities of creatine kinase (CK) and creatine kinase isoenzyme MB (CK-MB) were measured before operation, at arrival on the intensive care unit (ICU), and 6, 12, 24, 48, and 120 h after unclamping of the aorta. Twelve lead electrocardiograms (ECGs) were recorded preoperatively and at days 1, 2, and 5. Perioperative data and postoperative cTnI and cTnT levels were correlated statistically. RESULTS: Two patients died due to refractory myocardial failure in the early postoperative period. For further evaluation, patients were divided in two groups according to postoperative ECG changes (group I: patients without PMI, n = 107; group II: patients with PMI, n = 10: six of them with Q-wave and four of them with non-Q-wave PMI). Calculated best cutoff values for cTnI and cTnT were 8.35 microg/l and 0.768 microg/l in ROC (receiver-operator characteristic) analysis. Serum concentrations of cTnI, and cTnT were in the normal range preoperatively and increased significantly after surgery in both groups. In both groups, cTnI reached its medium peak level after 24 h (group I: 2.7 microg/l, 95% confidence interval [CI]: [2.1,3.2]); group II: 70.5 microg/l). CTnT reached its medium peak level in group I without PMI after 48 h (0.298 microg/l, 95% CI: [0.254,0.354]), in group II with PMI not until 120 h (3.0 microg/l) postoperatively. In group II serum level of both troponins remained considerably high at 120 h (cTnI median = 10.75 microg/l, cTnT median = 3 microg/l). CONCLUSION: Release patterns of cTnI and cTnT after CABG are different: cTnI reaches its postoperative peak value earlier and declines more quickly than cTnT. After uncomplicated CABG, serum levels of both cardiac troponins remain continuously low. Elevated concentrations reflect perioperative myocardial ischemia or infarction. CTnT shows a different release pattern in patients with or without myocardial infarction.     

心肌肌钙蛋白诊断和除外急性心肌梗死界限值的探讨

目的:探讨心肌肌钙蛋白(cTn)诊断和除外急性心肌梗死(AMI)的界限值。方法:因心血管疾病住院及尿毒症透析患者共334例,分为AMI组30例、心绞痛组90例、心力衰竭组56例、心律失常组41例、高血压组97例、尿毒症组20例。入院次日清晨空腹抽取血标本,同时测量cTnI、cTnT及肌酸激酶同工酶(CK-MB)。分析比较cTnI、cTnT及CK-MB达到正常参考人群数值的第95百分位数及2倍于此数值时对于诊断AMI的敏感性、特异性及准确性。结果:AMI组与其他各组相比,cTn和CK-MB增高差异有统计学意义(P<0.05);除AMI组外其他组患者cTnI、cTnT和CK-MB测定值均有部分高于正常参考人群数值的第95百分位数,且与AMI组有重叠。结论:cTnI和cTnT达到正常参考人群数值的第95百分位数时对AMI诊断的敏感性无明显差异,特异性cTnT高于cTnI。CK-MB的敏感性不高但是特异性很高,与cTnT类似,仍可做AMI排除诊断用。建议心肌标志物应该有2个界限值,一个是目前的正常参考人群数值的第95百分位数,为诊断AMI的界限值;另一个是2倍于此数值,用于排除非缺血性心肌损伤。     

External and internal electrical cardioversion: comparative, prospective evaluation of cell damage by means of troponin I

INTRODUCTION AND OBJECTIVES: In this study we measured the concentrations of cardiac troponin I (cTnI) and several biochemical markers of myocardial damage after elective external cardioversion or internal cardioversion by specific catheters or automatic defibrillators. MATERIAL AND METHODS: Biochemical markers were analyzed prospectively for 30 consecutive patients after electrical cardioversion. Concentrations of cTnI, myoglobin, creatine kinase (CK), CK-MB and the MB/CK ratio were determined in samples before cardioversion and 2, 8 and 24 h later. The shock energy ranged from 50 to 360 joules (235 106 joules) in external cardioversions and from 3 to 37 joules (15 8 joules) in internal cardioversions. RESULTS: We detected abnormal concentrations of CK, myoglobin, CK-MB and MB/CK in 33% of the patients after external cardioversion. The concentrations of cTnI remained within normal limits at all times, with no elevations detected. Whereas no abnormal concentration of any biochemical marker was detected in any patient who required internal cardioversion for atrial fibrillation, two patients who underwent external cardioversion from an automatic defibrillator did have abnormal concentrations of CK-MB, myoglobin, and even of cTnI. CONCLUSIONS: The concentration of cTnI remained below the detection limit after external cardioversion, even though the other more non-specific markers changed. No enzyme alteration was detected in patients who underwent internal cardioversion of atrial fibrillation.     

Patterns and diagnostic value of cardiac troponin I vs. troponin T and CKMB after OPCAB surgery.

BACKGROUND: Cardiac troponin I (cTnI) has been shown to be a specific marker for myocardial injury in cardiac surgery. The object of this prospective study was to determine the patterns and kinetic and diagnostic value of cTnI, cardiac troponin T (cTnT), and creatine kinase MB (CKMB) activity after minimally invasive coronary revascularization using an octopus device on the beating heart (OPCAB). METHODS: 48 patients (33 male/15 female, mean age 68.3 +/- 8.7 years) underwent their first elective OPCAB surgery with median sternotomy without mortality. The mean number of grafts was 2.0 +/- 0.8 per patient. Preoperative mean ejection fraction was 56.6 % +/- 14.9%. CTnI and T levels, total creatine kinase (CK) and CK-MB activity in the serum were measured before operation, at arrival at the ICU, and 6, 12, 24, 48 and 120 hours afterward. Serial 12-lead ECGs were recorded preoperatively and at days 1, 2 and 5. The relationship between perioperative data and postoperative cTnI and cTnT levels and CKMB were statistically identified for all variables. RESULTS: The best cutoff value for cTnI was 8.35 micrograms/l. The patients were grouped by the ECG findings and maximal slopes of cTnI postoperatively (group I: unchanged ECG and cTnI < 8.35 micrograms/l, n = 38; group II: unchanged ECG and cTnI > 8.35 micrograms/l n = 6; group III: Q-wave in ECG and cTnI > 8.35 micrograms/l, n = 4). Baseline serum concentrations of cTnI were in the normal range, and significantly increased after surgery with a peak 24h after the operation. Maximal slopes of cTnI ranged in group II between 9.1 and 18.0 micrograms/l, and in group III between 35.9 and 88.8 micrograms/l. There was strong concordance between maximum cTnI, cTnT (p < 0.0001) and CK-MB levels (p = 0.003). First cTnI levels immediately post-op correlated with the maximum cTnI levels during the postoperative course (p = 0.009). CONCLUSIONS: CTnI after minimal invasive surgery shows a characteristic pattern with a maximum at 24h after the operation. The measurement of postoperative biochemical marker concentrations, specially cTnI, reflects myocardial injury incurred during the procedure. It is an accurate method for confirming or excluding a perioperative myocardial injury diagnosis after OPCAB surgery.     

射频消融术前后心肌损害标志物的变化

目的　探讨血清肌酸激酶同工酶 (CK- MB)、心肌肌钙蛋白 I(c Tn I)、肌红蛋白 (Mb)检测 ,对射频消融术 (RF-CA)所致心肌损伤的诊断价值。方法　选择 30例室上性心动过速患者 ,分别于 RFCA前、电生理检查后、术后即刻、术后 1d、2 d采外周静脉血 ,采用美国德普公司自动免疫化学发光分析仪分别测定血清 CK- MB、 c Tn I、Mb。结果　 CK- MB术后 1d较术前增高 (P<0 .0 1) ;c Tn I与术前相比术后 1d、2 d明显增高 (P<0 .0 5 ) ;与术前相比术后即刻 Mb明显增高 (P<0 .0 1)。结论　 RFCA所造成心肌损伤属微小心肌损伤 ,可使血清心肌损害标志物有不同程度的升高 ,CK- MB、c Tn I、Mb可用于 RFCA对心肌损伤的监测。     

心肌肌钙蛋白I在不稳定型心绞痛患者中的应用价值

目的：探讨心肌肌钙蛋白I（cTnl)检测在不稳定型绞痛患中的临床应用价值。方法：对80例不稳定型心绞痛（UAP）患进行临床Braunwald分级,固相层析免疫法测定血清cTnI,酶学法测定肌酸磷酸激酶（CK）及其同功酶（CK－MB）,并观察住院期间心脏事件发生率。结果：80例UAP患中22例（27．5％）血清cTnI检测呈弱阳性或阳性,而CK－MB仅2例（2．5％）升高（P＝0．0001）。cTnI阳性组（22例）与阴性组（58例）之间临床除Braunwald分级存在差异（77．3％比48．3％,P＝0．02）外,其他均无差异。住院期间发生心脏事件率在cTnI阳性组较阴性组明显增高（40．9％比6．9％,P＝0．007）,多元logistic回归分析发现,cTnI是预测不稳定型心绞痛患住院期间心脏事件的最主要独立危险因素。结论：心肌肌钙蛋白I是反映心肌细胞损伤较灵敏、较特异的指标,是判断不稳定型心绞痛患近期预后的最主要独立预测因素。