心肌灌注显像对疑诊冠心病的胸痛患者的诊断价值

目的评估运动负荷实验心肌灌注显像对可疑冠心病的胸痛患者的诊断价值及对冠脉造影病例筛查的价值。方法105例有胸痛、胸闷不适，临床疑诊冠心病的患者，行常规心电图、超声心动图和201T1运动负荷心肌灌注显像，结果与冠状动脉造影检查对比，并分析心肌灌注显像的图象特点。结果心肌灌注显像诊断冠心病的灵敏度、特异性、阳性预测值和阴性预测值分别为91％、82．4％、89．9％、84、8％。心肌灌注异常组，冠脉造影阳性率达91．3％。结论201T1运动负荷心肌灌注显像对胸痛患者有很好的诊断价值，对冠脉造影病例的选择有很好的参考价值。     

冠心病的临床诊断和几种检查手段诊断效果的对比分析

目的 比较冠心病的临床诊断和几种检测手段诊断的诊断价值。方法 搜集国内近10年来发表的临床诊断或拟诊冠心病。且行冠状动脉造影和心电图和／或动态心电图、核素心肌灌注断层显像、超声心动图的病例，对其归纳分析。结果 在临床诊断或拟诊冠心病19180例病例中，有66．6％冠状动脉造影阳性；以冠状动脉造影的结果作为对照，核素心肌显像的诊断灵敏度为88．7％，静息超声心动图为65．7％，负荷超声心动图为74．2％，负荷心电图69．2％，运动心电图74．3％，动态心电图为63．0％。结论 建议对有胸痛、胸闷主诉且静息心电图有ST—T阳性改变的患者，临床进行冠心病诊断时应当谨慎，选择适当的辅助检查可提高诊断准确性。     

腺苷负荷心肌灌注显像诊断冠心病的临床应用

目的评价腺苷负荷心肌灌注显像对冠心病诊断的临床应用价值。方法住院疑诊冠心病患者53例,静息心肌灌注显像24h后行腺苷负荷心肌灌注显像,记录患者注射腺苷过程中的心率、血压及临床症状。所有患者2周内行冠状动脉造影,以冠状动脉造影为"金标准",分析腺苷负荷心肌灌注显像对冠心病诊断的敏感性、特异性等指标。结果腺苷负荷心肌灌注显像诊断冠心病的敏感性为88.9%,特异性70.6%,阳性预澍值86.5%,阴性预测值75.0%,准确性83.0%。诊断单支、二支和三支冠状动脉病变的敏感性分别为78.6%、90%和100%。整个过程中未发生严重不良反应。结论腺苷负荷心肌灌注显像对冠心病的诊断有较高的敏感性和特异性,可作为运动负荷心肌灌注显像的重要补充,值得在临床推广和应用。     

腺苷负荷实验心肌灌注核素显像在冠心病中的临床价值

目的 评价腺苷负荷试验心肌灌注显像诊断冠心病的敏感性、准确性、特异性. 方法 对132例临床疑诊冠心病患者,静脉泵入腺苷,剂量为140 g/(kg·min),用药时间6 min.泵入过程中,行心电监测,观察患者的症状、血压和心率.于泵入腺苷3 min末,静脉注射核素显像剂99m锝-甲氧基异丁基异腈核素显像(99mTc-MIBI)925 MBq,1.5 h后行心肌灌注断层显像,若显像异常,次日行静息心肌显像.所有患者行冠状动脉造影. 结果 在132例患者中,冠状动脉造影阳性87例,阴性45例,心肌核素显像阳性85例,阴性47例,两种检查结果 一致的病例数为108例.心肌核素显像假阳性的病例为11例,假阴性为13例.腺苷负荷试验心肌灌注显像诊断冠心病的敏感性为85.1%(74/87)、特异性为75.6%(34/45)、准确性为81.8%(108/132). 结论 腺苷负荷试验心肌核素显像对于冠心病诊断具有重要的临床应用价值.     

腺苷负荷心肌灌注显像在冠心病中应用的临床研究

目的研究腺苷负荷心肌灌注显像(MPS)与冠状动脉血管造影(CAG)的准确性及两者联合应用在评价冠状动脉病变及心肌缺血情况中的价值。方法对32例临床疑诊冠心病的患者先予静脉泵注腺苷注射液[剂量为0.14mg/(kg·min)]6min,注射3 min时静脉注入核素显像剂99mTc-MIBI925MBq,1 h后行心肌灌注断层显像,若显像异常,次日行静息心肌灌注显像。所有患者2周内行冠状动脉血管造影术检查。将腺苷负荷心肌灌注显像与冠状动脉造影结果进行对比分析,评价冠状动脉病变及心肌缺血情况。结果 32例患者中,14例冠状动脉造影显示为冠状动脉狭窄性病变,其中单支病变7例,二支病变4例,三支病变3例,腺苷负荷心肌灌注显像12例为阳性,2例阴性;18例冠状动脉造影显示未见明显狭窄,其中4例为壁冠状动脉,2例为冠状动脉慢血流,腺苷负荷心肌灌注显像为14例阴性,4例为阳性。腺苷负荷心肌灌注显像诊断冠状动脉阻塞性病变的敏感性为85.71%,特异性为77.78%,阳性预测值为75%,阴性预测值为87.5%,准确性为81.25%。结论腺苷负荷心肌灌注显像与CAG结果具有较好的一致性,两者联用能充分了解冠状动脉病变及心肌缺血情况,有利于临床治疗的选择。     

门控心肌灌注断层显像在临床的应用价值

目的:评估门控心肌灌注断层显像(Gated-SPECT)在临床的应用价值.方法:对照70例临床怀疑或已知冠心病患者和12例正常对照者进行潘生丁药物负荷后和静息时门控心肌灌注断层显像.应用AutoQUANT全自动定量软件获得心肌舒张末(ED)和收缩末(ES)心肌断层像,左室射血分数(LVEF)、舒张末期容积(EDV)、收缩末期容积(ESV)、局部室壁运动(WM)和局部室壁增厚率(WT)等定量指标.结果:(1)12例正常对照者负荷后LVEF、EDV、ESV值和静息时比较无明显改变.左室局部功能随室壁部位有较大差异.(2)门控和非门控心肌灌注断层显像比较:82例按非门控心肌灌注断层显像读片,29例(41%)未能明确诊断;结合门控心肌灌注断层显像读片,未能明确诊断数量减少至3例(4%).(3)15例可逆性心肌灌注缺损中,5例严重心肌缺血患者表现负荷后LVEF值较静息时明显减低,ESV扩大;5例陈旧心肌梗死患者,平均LVEF、ESV和EDV值分别为30.60%、169ml、220ml.结论:门控心肌灌注断层显像可改善核素心肌灌注显像对冠心病的诊断灵敏度和特异性,值得临床推广应用.     

腺苷负荷心肌灌注显像与64层螺旋CT血管造影的对照研究

目的 研究腺苷负荷心肌灌注显像与冠状动脉64层螺旋CT血管造影(MSCTA)的相关性及两者联合应用在评价冠状动脉病变及心肌缺血情况中的价值.方法 对35例临床疑诊冠心病或有心肌缺血性疾病史的患者分别静脉注射腺苷和核素显像剂99mTc-MIBI,1 h后行心肌灌注断层显像,若显像异常,次日行静息心肌灌注显像.所有患者行64层螺旋CT冠状动脉血管造影.将腺苷负荷心肌灌注显像与MSCTA结果 进行对照,研究两者的相关性并联合评价冠状动脉病变及心肌缺血情况.结果 MSCTA显示18例冠状动脉未见明显狭窄者中,9例有壁冠状动脉腺苷负荷心肌灌注显像均为阳性;右冠状动脉显示纤细2例,腺苷负荷心肌灌注显像1例阳性,1例阴性;伴有冠状动脉钙化斑块2例,腺苷负荷心肌灌注显像1例阳性,1例阴性;5例冠状动脉未见异常者腺苷显像均为阴性.4例冠状动脉狭窄＜50%者,1例腺苷负荷心肌灌注阴性;2例有壁冠状动脉及1例心尖区低密度灶者,腺苷负荷心肌灌注显像均阳性.12例狭窄≥50%者,腺苷负荷心肌灌注显像11例阳性,1例阴性.1例伪影明显者,腺苷负荷心肌灌注显像示局部血流灌注轻度减低.结论 腺苷负荷心肌灌注显像与MSCTA结果 具有较好的一致性,两者联合能充分了解冠状动脉病变及心肌缺血情况.     

门控运动负荷/静息心肌灌注显像在冠心病诊断中的临床价值

目的:探讨门控心肌灌注断层显像在冠心病诊断中的诊断价值.方法:对50例疑诊冠心病患者进行运动,静息99mTc-MIBI门控心肌灌注断层显像和冠状动脉造影检查,冠状动脉狭窄>50%为冠心病的诊断标准,并将结粜进行对比分析.结果:检查冠心病的灵敏度为83.84%,特异性为84.71%,准确性为91.00%.检测左前降支(LAD)病变的灵敏度为80.62%,左旋支(LCX)为75.70%,右冠状动脉(RcA)为82.87%.检测LAD病变的准确性为76.00%,LCX为79.05%,RCA为80.30%,11例冠状动脉造影显示50%～70%狭窄与门控心肌灌注断层显像的相关性较差(r=13,P>0.05),39例冠状动脉造影显示>70%狭窄与门控心肌灌注断层显像有良好的相关性(r=0.05,P<0.05).结论:门控心肌灌注断层显像诊断冠心病,敏感性与特异性较高,对冠心病的无刨性诊断具有重要价值.     

ATP负荷SPECT心肌灌注显像在小儿病毒性心肌炎中的应用

目的 探讨三磷酸腺苷(ATP)负荷SPECT(单光子发射计算机断层摄影术)心肌灌注显像在小儿病毒性心肌炎(VMC)诊断中的价值.方法 对正常健康小儿15例及VMC 38例、疑诊心肌炎(SVMC) 32例分别用SPECT行99mTc-MIBI(甲氧基异丁基异腈)静态门控心肌断层显像和ATP负荷心肌灌注显像检查.结果 健康组15例均行SPECT静息显像,其中8例行ATP负荷显像,均示放射性分布均匀.VMC组ATP负荷显像38例,阳性率89.5％ (34/38),静息显像27例,阳性率为8l.5％(22/27);SVMC组ATP负荷显像32例,阳性率62.5％ (20/32),静息显像22例,阳性率为54.5％(12/22);通过靶心图分析病变程度,2组ATP负荷与静息显像比较差异亦有统计学意义(P均＜0.05).结论 ATP负荷SPECT心肌灌注显像与静态门控心肌断层显像能直观显示病变部位与范围,对VMC诊断的敏感性前者高于后者,在SVMC中有助于了解轻度心肌细胞病变.     

三种冠心病检查方法的临床比较

目的：分析冠脉造影、心电图踏车运动试验以及门控心肌灌注断层显像诊断冠心病的情况。方法：分别对59例患者行冠脉造影、心电图踏车运动试验及门控心肌灌注断层显像检查。结果：冠脉造影结果仅1例与临床不符，心电图踏车运动试验诊断冠心病的灵敏度及特异度分别为45．2％和82．1％，门控心肌灌注断层显像诊断冠心病的灵敏度及特异度分别为83．9％和39、3％。结论：冠脉造影对冠心病有极高的诊断价值，目前仍是不可取代的冠心病诊断方法．但仍有不足之处，门控心肌断层显像对冠心痛有较高的诊断价值，可以和冠状动脉造影检查结果互为补充．灵敏度较好，但特异性不太高，阳性须结合临床考虑。心电图踏车运动试验诊断冠心病的特异性较高，联合门控心肌断层显像结果进行判断可使诊断冠心病的灵敏度进一步提高。     

腺苷负荷99mTc-MIBI门控心肌显像诊断冠心病临床价值

[摘要] 目的 以冠状动脉造影（Coronary angiography, CAG）为“金标准”,探讨在腺苷负荷下99mTc-MIBI SPECT门控心肌血流灌注显像（Myocardial perfusion imaging, MPI）对冠心病(Coronary artery disease, CAD)的诊断效能。方法 43例怀疑CAD患者而进行CAG检查的患者,检查前均接受了腺苷99mTc-MIBI负荷门控MPI,观察患者心脏室壁血流灌注情况。与CAG检查结果相对照,比较腺苷负荷介入下MPI对CAD诊断的效能。结果 腺苷负荷MPI诊断CAD的灵敏度为84.6%,特异度为88.2%,准确性为86.0%,对左前降支、回旋支、右冠状动脉狭窄（≥50%）的检测灵敏度和特异度分别为 95.0%和82.6%,77.8%和88.2%,84.6%和70.0%。对单支、双支、3支冠脉病变诊断的灵敏度分别为71.4%,87.5%,100%。结论 腺苷负荷99mTc-MIBI MPI对CAD的诊断准确率高,对诊断无法进行运动患者的冠脉血管病变具有重要临床价值。     

Comparison of 99mTc-methoxyisobutylisonitrile myocardial single-photon emission computed tomography and electron beam computed tomography for detecting coronary artery disease in patients with no myocardial infarction

Background Previous studies have compared single-photon emission computed tomography (SPECT) and electron beam computed tomography (EBCT) in detection of coronary artery disease (CAD) in patients with myocardial infarction (MI). The purpose of this study was to compare SPECT with EBCT in detection of CAD in patients with no MI.Methods One hundred and forty-seven patients with suspected CAD underwent stress-rest 99mTc-methoxyisobutylisonitrile (99mTc-MIBI) myocardial SPECT, cardiac EBCT and coronary angiography (CAG) within one month. Of them, 73 patients (aged 52.6±10.6 years old) with no history of MI were included in this study. Coronary artery calcium (CAC) was defined as a CT value ≥130 HU within the boundary of coronary artery on EBCT. Results There were 35 and 38 patients with or without CAD according to CAG. Ninety-six percent of the patients with abnormal SPECT and CAC had a coronary arteries stenosis ≥50%, and 90.9% patients with normal SPECT and EBCT showed no CAD. The sensitivity of SPECT and EBCT in detection of CAD was comparable, and the specificity of SPECT (92.1%) was significantly higher than that of EBCT (55.3%) (P&lt;0.005). For the detection of individual coronary artery stenosis, both sensitivity and specificity of SPECT (75.0% and 93.7%) were significantly higher than those of EBCT (53.3% and 76.7%) (P&lt;0.025 and P&lt;0.005, respectively). In patients without chest pain, the sensitivity and specificity of SPECT (76.9% and 91.4%) were significantly higher than those of EBCT (23.1% and 69.0%) in detection of a coronary artery stenosis of ≥50% (P&lt;0.01 and P&lt;0.005, respectively). However, in patients with chest pain, both sensitivity and specificity of SPECT were comparable to those of EBCT. In patients ≤45 years old, the sensitivity of SPECT (77.8%) was significantly higher than that of EBCT (27.8%) in assessing a coronary artery stenosis of ≥50% (P&lt;0.005), and the specificity of SPECT was comparable to that of EBCT. In patients &gt;45 years old, the specificity of SPECT (94.3%) was significantly higher than that of EBCT (70.5%) (P&lt;0.005), and the sensitivity of SPECT was comparable to that of EBCT. Conclusion 99mTc-MIBI myocardial perfusion SPECT has higher accuracy than that of EBCT in detection of CAD in patients without MI.     

核素心肌灌注显像在冠心病危险度分层中的临床意义

目的 评价核素心肌灌注显像在冠心病危险度分层中的临床价值及意义.方法 对均进行了核素心肌灌注显像[核素选用99mTc-甲氧基异腈(MIBI),心肌灌注显像采用静息-腺苷药物负荷试验]及冠状动脉(简称冠脉)造影的13例患者进行观察和对比,对核素心肌灌注显像阳性者10例、核素心肌灌注显像阴性者3例与各自的冠脉造影对比,评判核素心肌灌注显像对胸闷、胸痛等不同症状患者心肌缺血程度初步估测,并进行危险评估.结果 核素心肌灌注显像提示严重心肌缺血6例,在相应冠脉造影中均发现冠脉病变多为2支以上,且狭窄程度多在70%以上,均进一步行球囊扩张和(或)支架置入术;提示轻度心肌缺血4例,随后冠脉造影发现多为1支病变,狭窄程度多为50%～70%,均进行药物治疗;另3例核素心肌灌注显像阴性者冠脉造影无明显异常发现.结论 核素心肌灌注显像对冠心病进行危险度分层及选择治疗、评估预后有重要意义.     

Clinical evaluation of 99mTc-MIBI myocardial tomography for detecting coronary artery disease.

To evaluate the clinical efficacy of 99mTc-MIBI myocardial tomography for detecting coronary artery disease, 34 consecutive patients who underwent both 99mTc-MIBI study and coronary arteriography were included in the present study. Ten without and 24 with significant coronary artery disease were documented by coronary arteriography. The overall sensitivity and specificity of 99mTc-MIBI study for detecting coronary artery disease were 91.8% (22/24) and 80.0% (8/10), respectively. In subset studies, 16 of 17 (94.1%) patients with previous myocardial infarction and 6 of 7 (85.7%) patients with significant CAD but without MI were identified as abnormal. Reversible perfusion abnormalities were shown in 4 of 5 patients undergoing both exercise and rest studies. Rest perfusion abnormalities were shown in 2 patients with unstable angina pectoris who underwent only rest study. In conclusion, 99mTc-MIBI myocardial tomography provides a reliable method for detecting coronary artery disease. Rest study has high sensitivity for identifying patients with MI, and exercise/rest study can identify patients with significant CAD but without MI.     

THE VALUE OF 99mTc-MIBI MYOCARDIAL PERFUSION SPECT IMAGING IN DETECTING CORONARY ARTERY DISEASE IN PATIENTS WITH VALVULAR DISEASE BEFORE OPERATION

Objective. The aim of this study was to detect coronary artery disease using ^99mTc-MIBI myocardial perfusion imaging in patients with valvular disease. Methods. Thirty patients with valvular disease confirmed by echocardiography underwent ^99mTc-MIBI myocardial perfusion imaging using multiSPECT lh after stress test (exercise, dipyridamole or dobutamine test) and were performed coronary angiography within 1 month before valvular operation. Results. For 29 out of the 30 patients, the results of ^99mTc-MIBI myocardial perfusion imaging were similar with those of coronary angiography, the concordance rate was 96.7 % and the negative predictabili-ty was 100%. Conclusion. ^99mTc-MIBI myocardial perfusion imaging is a reliable non-invasive method for detecting coronary artery disease in patients with valvular disease and so as to draw up suitable operation programs for them.     

门控核素心肌灌注显像诊断左束支传导阻滞合并冠心病的价值研究

目的:探讨99Tcm-MIBI门控心肌灌注显像(G-MPI)在左束支传导阻滞(LBBB)病人中诊断冠心病的价值.方法:50例LBBB患者均完成二日法门控负荷/静息MPI、心电图平板运动试验(ETT)、超声心动图检查.比较NG-MPI和G-MPI在LBBB病人中诊断冠心病的准确性,并对各种无创性诊断技术的诊断价值进行比较.结果:G-MPI诊断的特异性和准确性方面要明显高于NG-MPI(P<0.05),G-MPI与NG-MPI相比能明显提高对LAD病变诊断的特异性和准确性(P<0.05).G-MPI诊断的敏感性要高于ETT,P<0.05.在诊断的准确性方面G-MPI与ETT相比有极显著性差异(P<0.01).结论:门控心肌灌注显像在LBBB病人中诊断冠心病具有较高的准确性,与非门控心肌显像和其它无创性诊断技术相比具有一定的优势.     

多巴酚丁胺负荷99mTc-MIBI心肌显像诊断冠心病的价值

目的 探讨多巴酚丁胺负荷（ＤＳＴ）＾９９ｍＴｃ－ＭＩＢＩ心肌显像诊断冠心病的安全性和可靠性。方法 ７９例无心肌梗塞史的可疑冠心病患者进行ＤＳＴ心肌显像,观察各种副反应。其中４８例进行了冠脉 造影,以冠脉直径狭窄〉５０％作为冠心病诊断标准,判定ＤＳＴ心肌显像诊断冠心病的敏感性和特异性。结果 ４８例冠脉 造影患者中２０例诊断为冠心病其中１７例ＤＳＴ心肌显像异常;２４例冠脉造影正常或轻度狭窄患者中,２０     

99mTc-MIBI心肌SPECT显像诊断冠心病及检测存活心肌

目的:评估99mTc-甲氧基异丁基异腈（MIBI）心肌断层显像诊断冠心病及检测存活心肌的临床应用价值。方法:24例患者行潘生丁药物负荷及静息心肌断层显像;20例心肌梗死患者在血管重建术前行静息及硝酸甘油介入心肌断层显像,血管重建术后1个月重复行静息心肌断层显像。44例患者均行冠状动脉造影。分析对比心肌断层显像与冠状动脉造影结果以及血管重建术前后的心肌断层显像结果。结果:99mTc-MIBI心肌断层显像对冠心病诊断敏感性为94％,阳性预测值为86％;硝酸甘油介入99mTc-MIBI心肌断层显像对存活心肌的阳性预测值为86％,阴性预测值为79％,预测准确率为83％。结论;99mTc-MIBI心肌断层显像在诊断冠心病,检测存活心肌方面有较大的临床应用价值。     

门控心肌灌注显像对病毒性心肌炎的诊断价值

目的 探讨门控心肌灌注显像对病毒性心肌炎的诊断价值。方法 对38例病毒性心肌炎进行门控^99mTc-甲氧基异丁基异腈(MIBI)心肌显像。结果 门控^99mTc-MIBI心肌显像异常者28例．占心肌炎患者的74％(28／38)。其中放射性分布Ⅱ度(明显放射性分布稀疏区)24例，占86％；Ⅲ度放射性分布缺损区4例．占14％。病灶呈Ⅰ型单灶性损害3例．占11％；Ⅱ型多灶性损害21例，占75％；Ⅲ型大面积损害4例．占16％。结论 门控心肌灌注显像能较直观地表现病变心肌的部位、形态、范围和程度，为病毒性心肌炎的诊断提供较为敏感的检查手段。