多巴酚丁胺和潘生丁负荷试验对冠心病诊断价值的比较

目的比较多巴酚丁胺和潘生丁负荷心肌显像对冠心病的诊断价值及对心肌梗塞后残余心肌缺血的检出率。方法与结果对１１０例冠心病患者进行药物介入９９ｍＴｃ－ＭＩＢＩ心肌显像,其中多巴酚丁胺心肌显像５２例,潘生丁心肌显像５８例,诊断冠心病的敏感性、特异性、阳性预测值和诊断准确率分别为９２３％对８７９％、９４１５％对８９５％、９６０５％对９２７％和９３０％对８８５％,差异无显著性。对心肌梗塞后残余心肌缺血的检出率（７／９对９／１２）,亦无明显差异。研究过程中未发现严重副作用。结论多巴酚丁胺和潘生丁负荷心肌显像对冠心病诊断均具有较高的敏感性和特异性,二者对于心肌梗塞后残余心肌缺血检出率也相似,同时也是安全的,可以代替运动试验。     

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     

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.     

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。     

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.     

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。     

99mTc-MIBI myocardial perfusion imaging in patients with diabetes]

Seventy-four patients with diabetes were taken on both stress and rest 99m-Tc-MIBI SPECT imaging: 44 patients (59.5%) were found having myocardial ischemic disorders, including 28 cases of myocardial ischemia, 7 cases of myocardial infarction and 9 cases of both conditions. 113 segments were involved and 46% were located in the posterior and inferior walls, indicating that the right coronary artery is most susceptive to ischemia. Diabetic patients complicated hypertension and/or hyperlipidemia were at higher risk of either early occurrence of coronary disease. 99mTc-MIBI SPECT imaging is helpful in early diagnosis and therefore is significant in directing.     

SPECT/CT显像在评估缺血性心肌病患者的存活心肌中的应用价值

目的 以2-氟-18-氟-2-脱氧-D-葡萄糖(¹⁸F-fluorodeoxyglucose,¹⁸F-FDG)PET/CT心肌代谢显像为金标准,探讨锝-99m-4,9-二氮-3,3,10,10-四甲基十二烷-2,11-二酮肟(technetium-99m labeled 4,9-diaza-3,3,10,10-tetramethyldodecan-2,11-dione dioxime,^99mTc-HL91)SPECT/CT乏氧显像结合锝-99m-甲氧基异丁基异腈(technetium-99m labeled sestamibi,^99mTc-MIBI)SPECT/CT心肌灌注显像评估缺血性心肌病(ischemic cardiomyopathy,ICM)患者不同缺血程度及不同冠状动脉供血区存活心肌的价值。方法 纳入66例ICM患者,于^99mTc-MIBI心肌灌注显像当日行^99mTc-HL91乏氧显像、次日行¹⁸F-FDG心肌代谢显像。将左...     

Quantitative Analysis of the Tomographic Technetium－99m MIBI （~（99m）Tc－MIBI） Myocardial Bullseye Display： Application to Diag

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硝酸甘油介入~(99m)Tc-MIBI心肌灌注显像检测存活心肌

目的　应用硝酸甘油 (NTG)介入99mTc -甲氧基异丁基异腈 (MIBl)SPECT心肌显像评价心肌梗死患者心肌细胞存活的情况。　方法　 2 0例心肌梗死患者分别行99mTc -MIBI静息和NTG介入心肌显像 ,并进行对比分析。　结果　 2 0例患者共有 75个心肌灌注异常节段 ,其中 3 2个节段在NTG后心肌血流灌注改善 ,呈现可逆性缺损 ,占 42 .67%。结论　NTG介入99mTc -MIBISPECT心肌显像可明显提高心肌梗死患者存活心肌细胞的检出率。     

平板运动试验与双核素心肌显像检测存活心肌的对比研究

目的采用99mTc-甲氧基异丁基异腈（MIB）I/18F-脱氧葡萄糖（FDG）双核素SPECT心肌显像与平板运动试验对陈旧性心肌梗死患者存活心肌检测进行比较,探讨平板运动试验评价陈旧性心肌梗死患者存活心肌的可行性及临床价值.方法选择确诊的陈旧性心肌梗死患者45例,所有患者均行99mTc-MIBI/18F-FDG双核素SPECT及平板运动试验检查.根据99mTc-MIBI/18F-FDG双核素SPECT显像结果判定存活心肌,将患者分为两组,即心肌存活组与心肌无存活组.比较平板运动试验各项指标在两组间的变化,分别计算其识别存活心肌的敏感性、特异性和准确性.结果 45例患者中24例为心肌存活组（n=24）,21例为心肌无存活组（n=21）;心肌存活组中87.5%（21/24）Q波延长,75.0%（18/24）QT离散度≤70 ms;Q波延长判断心肌存活的敏感性、特异性和准确性分别是87.5%、85.7%和86.7%,QT离散度≤70 ms判断心肌存活的敏感性、特异性和准确性分别是75.0%、71.4%和60.0%.结论在陈旧性Q波型心肌梗死单支病变患者中,平板运动试验指标Q波延长和QT离散度检测存活心肌具有较高的敏感性和特异性.     

舌下硝酸甘油99mTc-MIBI显像检测冬眠心肌的初步探讨

目的 :探讨静息 -舌下硝酸甘油99mTc-MIBI心肌显像 (NG -Tc-SPECT)检测冬眠心肌的价值。方法 :2 4例存在节段心肌收缩功能不全的冠心病患者行NG -Tc -SPECT检查 ,其中 3例行PET心肌代谢显像 ,PTCA术前及术后 1周查超声心动图 ,根据节段收缩功能的近期改善情况评价NG -Tc-SPECT检测冬眠心肌的价值。结果 :NG -Tc -SPECT检测冬眠心肌节段的敏感性、特异性、准确性、阳性预测值和阴性预测值分别为 92 .5 %、6 9.4 %、81.2 %、77.1%和 89.3% ;检测冬眠心肌患者的相应指标分别为 88.2 %、71.4 %、83.3%、88.2 %和 71.4 %。NG -Tc-SPECT与PET心肌代谢显像检测冬眠心肌的敏感性和特异性无统计学差异 (P >0 .0 5 )。结论 :静息 -舌下硝酸甘油99mTc-MIBI心肌显像是一种简便安全而有价值的冬眠心肌检测方法。     

核素心肌灌注显像对扩张型心肌病和缺血性心肌病的鉴别诊断价值

目的探讨^99mTc-MIBI心肌灌注显像（MPI）对扩张型心肌病（DCM）和缺血性心肌病（ICM）的鉴别诊断价值。方法55例确诊心肌病患者,根据病史、超声心动图检查,分成扩张型心肌病组（25例）和缺血性心肌病组（30例）。同时完成核素^99mTc-MIBI心肌灌注显像与冠脉造影（CAG）检查。观察^99mTc-MIBI在心肌的分布情况,分析病损心肌、病变血管之间的关系。结果①所有55例患者,心肌灌注显像都^99mTc-MIBI放射性分布异常：DCM组节段性灌注完全缺损2例（8%）,均匀减低14例（56%）,不均匀减低3例（12%）,花斑样改变6例（24%）;ICM组节段性灌注完全缺损29例（96.67%）,均匀减低1例（3.33%）。冠脉造影检查：DCM组仅1例（4%）发现冠脉异常,但狭窄程度〈50%,ICM组30例（100%）都有不同程度的冠脉狭窄（≥50%）;②以核素^99mTc-MIBI在心肌不均匀减低和/或花斑样分布为标准,MPI诊断DCM的敏感性为96.15%,特异性为95.6%,以核素^99mTc-MIBI在心肌呈节段性灌注完全缺损分布为标准,MPI诊断ICM的敏感性是96.7%,特异性是92%。结论核素^99mTc-MIBI心肌灌注显像在心肌的这种特征性分布,对扩张型心肌病和缺血性心肌病的诊断和鉴别诊断有较高的临床价值,与冠脉造影有很好的相关性,值得在临床推广应用。     

核素时相分析在陈旧性心肌梗塞定位诊断中的价值

对３０例陈旧性心梗（ＯＭＩ）病人和２２例正常人进行了核素心血池显像及时相分析，并与９９ｍＴｃ—ＭＩＢＩ心肌显像进行比较。结果表明：ＯＭＩ组心室相角程异常增宽，左室射血分数明显降低，与正常对照组比较有显著性差异（Ｐ＜０．０１）。时相图显示的心室异常区与心肌显像所示的放射性缺损区符合卒为９２．６％，时相图所示的异常范围大于后者。提示：时相分析不仅能反映心室功能及收缩时相的变化，而且在梗塞区及邻近缺血区定位诊断中有一定的应用价值。     

硝酸甘油介入99mTc-MIBI SPECT心肌灌注显像评价存活心肌

目的探讨含服硝酸甘油(NTG)介入99mTc甲氧基异丁基异晴(99mTc-MIBI)单光子发射计算机断层(SPECT)心肌灌注显像在检测存活心肌中的价值。方法18例心肌梗死患者分别行99mTc-MIBI静息显像和24h后再次静脉注射99mTc-MI-BI,在注射前5min,患者给与硝酸甘油1.0mg舌下舍服,再次行静息心肌断层显像,并进行对比分析。结果18例患者共有97个心肌灌注异常节段,其中44个心肌节段在NTG后心肌血流灌注改善,呈现可逆性缺损,占45.36%;53个节段无变化。结论NTG介入99mTc-MIBISPECT心肌灌注显像可明显提高心肌梗死患者存活心肌细胞的检出率,可以真实地评价心肌梗死的面积和部位,并且操作安全、无创、方便。     

多层螺旋CT血管造影在评价冠状动脉粥样硬化性心脏病心肌缺血程度价值分析

目的分析冠状动脉粥样硬化性心脏病心肌缺血程度应用多层螺旋CT血管造影的评价价值。方法选取2014年7月至2018年7月就诊于西电集团医院及榆林市第一医院影像科的80例疑似冠心病患者,均行MSCTA检查,以CAG检查为对照,计算MSCTA检查冠脉狭窄的准确性、敏感性、特异性,并比较CAG、MSCTA检出冠脉狭窄程度情况;再行核素M PI检查,计算M S CTA检出狭窄冠脉的心肌灌注积分差、负荷总积分。结果以CAG检查为对照,在80疑似患者中,MSCTA检查显示:68例患者存在冠脉狭窄共166支,准确性、敏感性、特异性、阳性预测值、阴性预测值分别为96.68%、97.58%、95.28%、96.99%、96.19%。MSCTA、CAG检出冠脉不同狭窄的程度比较无统计差异(P>0.05)。在MSCTA检查中,轻度狭窄组的灌注积分差(0.80±0.60)分、心肌负荷总积分(2.00±1.58)分,均比中度狭窄组、重度狭窄组低,差异显著(P<0.05)。结论MSCTA不仅能评估冠状动脉狭窄程度,判断导致冠状动脉狭窄的斑块性质,还能初步判断冠心病心肌缺血的程度,具有较高的准确性、敏感性、特异性,临床应用价值高。     

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.     

静脉应用二硝酸异山梨酯和5-单硝酸异山梨酯抗心肌缺血起效时间的临床研究

目的 比较静脉应用5-单硝酸异山梨酯(5-ISMN)和二硝酸异山梨酯(ISDN)时达到抗心肌缺血作用所需起效时间的差异。方法 将25例有心绞痛的冠心病患者随机分为ISDN组(13例)和5-ISMN组(12例)，应用99mTc- MIBI心肌断层显像和心电图分别观察用药前及用药后不同时间段(3、15和45min)心肌缺血改善情况。结果 ISDN组患者给药后3min心肌99mTc-MIBI稀疏缺损区即消失或明显缩小ll例(84．6％)；而5-ISMN组仅2例(15．4％)有改善；用药后15min ISDN组的改善程度也明显优于5-ISMN组。与给药前比较，ISDN组给药后3和15min 99Tc-MIBI心肌摄取比值和心电图有明显改善；而5-ISMN组给药后3min与给药前的差异无显著性，15min时虽有明显改善，但仍显著低于ISDN组；45min后两组心肌缺血改善情况的差异无显著性。结论 有心绞痛发作的冠心病患者静脉应用ISDN达到抗心肌缺血的作用所需的起效时间明显早于5-ISMN，可作为治疗急性抗心肌缺血的首选药物。     

^99mTc—MIBI心肌灌注断层显像监测蒽环类药物的心脏毒性

目的：探讨^99mTc—MIBI心肌灌注断层显像在蒽环类药物心脏毒性监测中的价值。方法：23例接受蒽环类药物治疗的患者，在治疗前进行心电图、心肌酶学检查、核素心室造影测左室射血分数(LVEF)和^99mTc—MIBI心肌灌注断层显像并计算相对定量值。并于每一周期治疗后重复上述检查。结果：蒽环类药物治疗一周期后，23例患者心肌相对定量值明显下降(P＜0．01)。其中11例吡喃阿霉素、6例表阿霉素和6例米托蒽醌治疗的患者，心肌相对定量值明显下降(P＜0．05)，心电图和心肌酶学无明显变化(P＞0．05)。蒽环类药物治疗多周期后的10例患者心肌相对定量值较治疗前下降(P＜0．05)。9例患者的心肌相对定量值(最大累积剂量为200mg／m^2)与一周期后无明显差别(P＞0．05)。10例患者治疗前及多周期治疗后LVEF均＞60％，又化疗前后无明显差别(P＞0．05).结论：^99mTc—MIBI心肌灌注断层显像能监测蒽环类药物所致的心肌损害，且较左室射血分数敏感，比心电图和心肌酶学检查优越，有利于指导蒽环类药物的临床应用。     

176例冠状动脉造影阳性患者动态心电图比较分析

目的:评价动态心电图对冠心病的诊断价值.方法:选择176例冠状动脉造影阳性的患者,回顾分析其动态心电图心肌缺血的变化.结果:176例患者中动态心电图检查心肌缺血阳性率为75.6%,其中3支、双支、单支病变阳性率分别为90.2%、73.7%和68.4%;动态心电图ST段压低幅度、持续时间、出现阵次随冠脉狭窄支数增多、程度增强而显著增加.结论:动态心电图是理想的筛查冠心病的无创伤性检查技术,特别是对双支及以上病变的冠心病患者.