硝酸甘油^99mTc—MIBI心肌断层显像对冠心病的诊断价值

目的：探讨硝酸甘油^99mTc-甲氧基异丁基异腈（MIBI）心肌断层显像对冠心病的诊断价值。方法：对80例疑冠心病（CHD）患者进行静息和硝酸甘油^99mTc-MIBI心肌显像，并以冠状动脉造影（CAG）对照，结果：硝酸甘油^99cTc-MIBI心肌显像诊断CHD的敏感性为95.2%，特异性为86.8%；诊断单支，双支及三支病变的敏感性分别为92.6%、100%、100%。结论：99mTc-MIBI心肌断层显像对CHD诊断准确率较高，值得临床广泛应用。     

99Tcm-MIBI SPECT心肌显像在心脏移植术后随访的临床应用价值

目的评价^99m锝-甲氧基异丁基异腈（^99Tc^m-MIBI）运动-静息SPECT心肌显像在心脏移植术后随访的临床应用价值。方法对10例长期存活的心脏移植患者进行^99Tc^m-MIBI运动-静息心肌显像随访心肌血供情况,同时进行冠状动脉造影、心电图等检查。结果经^99Tc^m-MIBI运动-静息心肌灌注显像示有4例患者出现放射性分布可逆性缺损,提示该节段心肌缺血,与冠状动脉造影检查结果相符。心电图均基本正常。结论心脏移植长期存活患者定期行^99Tc^m-MIBI运动-静息心肌显像,有助于早期了解心肌血流灌注情况,对其后续治疗决策具有一定的临床应用价值。     

心肌灌注显像和冠状动脉造影的对照初评(附46例分析)

目的评价心肌灌注显像与冠状动脉造影间的相关性.方法对46例冠心病患者的冠脉造影狭窄定量测定结果和99mTc-MIBI静息心肌断层显像定性、定量分析结果进行比较.结果显示冠状动脉狭窄程度和相应心肌MIBI摄取定性、定量结果有良好的相关性,说明99mTc-MIBI心肌显像可间接地反映冠状动脉的血流状况,能较准确地预测冠状动脉的狭窄及其程度,可应用于冠心病的诊断、冠脉造影的筛选以及评判冠脉狭窄治疗前、后心肌血流灌注改善程度.     

99Tcm-MIBI运动心肌灌注断层显像与冠状动脉造影的对比分析

目的对比分析^99Tc^m-MIBI运动心肌灌注断层显像(MPI)与冠状动脉造影(CAG)在冠心病(CAD)诊断中的价值。方法对92例临床疑诊CAD患者的MPI及CAG检查结果进行比较。结果MPI的灵敏度分别为83．9％，特异性分别为69．1％，二者符合率为94．7％。结论MPI能为CAD诊断提供有临床价值的信息，大部分MPI正常患者无需再行CAG检查。     

符合电路SPECT心肌灌注／代谢显像诊断冠心病的初步研究

目的 研究符合电路SPECT心肌灌注／代谢显像诊断冠心病的临床价值。方法 28例冠心病患者,男26例,女2例分别行心肌血流灌注和心肌代谢显像,全部28例均行冠状动脉造影,25例行心电图运动平板试验。结果 以冠脉造影为金标准,心肌灌注显像、心肌灌注／代谢显像和心电图运动平板试验诊断冠心病的准确率分别为82．14％,89．28％和72％（P＜0．05和P＜0．01）。结论 符合电路SPEFCT心肌灌注／代谢显像,在冠心病的诊断中具有一定的应用价值,且优于静息心肌血流灌注显像和心电图运动平板。     

静息门控断层心肌灌注显像在冠心病治疗抉择中的价值王 平,王远智,叶世琴,等

目的探讨静息门控断层心肌灌注显像在冠心病治疗抉择中的价值。方法54例心脏疾病患者,其中冠心病32例,动脉粥样硬化13例,其他心脏疾病9例（心肌桥3例、心肌病5例、x综合征1例）,均行静息门控断层心肌灌注显像检查,并与冠状动脉造影结果进行对比分析。结果静息门控断层心膪灌注显像阳性率分别为：冠心病组94％（30／32）、动脉粥样硬化组69％（9／13）、其他心脏疾病组100％（9／9）。结论静息门控断层心肌灌注显像可灵敏反映心肌血供状况及预估心肌活力,在心血管疾病,尤其是冠心病（CAD）的诊断、危险分层、疗效评估、预后判断和治疗方案的制定中有着非常重要的价值。应作为冠脉造影及支架安放或搭桥术前基础评估手段,避免盲目’过度治疗。     

硝酸甘油介入99^mTc-MIBI心肌灌注显像诊断冠心病及估测心肌存活性的价值

目的：评价硝酸甘油介入99^mTc-MIBI心肌灌注显像（SPECT）诊断冠心病及估测心肌存活性的价值。方法：48例可疑冠心痛患者，于冠状动脉造影（CAG）术前1周内行静息、硝酸甘油介入99^mTc-MIBI心肌SPECT检查，以CAG为金标准，观察硝酸甘油介入99^mTc-MIBI心肌SPECT诊断冠心病的准确性。对于25例成功行经皮冠脉介入治疗（PCI）的冠心病患者，以PCI术后3个月室壁运动改善为检验标准，评价硝酸甘油介入99^mTc-MIBI心肌SPECT检测存活心肌的应用价值。结果：硝酸甘油介入99^mTc-MIBI心肌SPECT诊断冠心病的敏感性、特异性、准确性分别为83．9％、76．5％、81．3％，评价存活心肌的敏感性为91．8％，准确性为84．9％。结论：硝酸甘油介入99^mTc-MIBI心肌SPECT在诊断冠心痛及估测心肌存活性有较高的临床应用价值。     

心肌灌注显像剂~(99m)Tc-Tetrofosmin临床应用的研究

目的：通过与冠状动脉造影比较,评价９９ｍＴｃ－ Ｔｅｔｒｏｆｏｓｍｉｎ心肌灌注显像在冠心病诊断中的价值。方法：对 ２４例受检者（ＣＨＤ１４例,非 ＣＨＤ１０例）进行静息和运动负荷状态下的９９ｍＴｃ－ Ｔｅｔｒｏｆｏｓｍｉｎ心肌 ＳＰＥＣＴ显像,同期也行冠状动脉造影。结果：以冠状动脉造影为金标准,９９ｍＴｃ－Ｔｅｔｒｏｆｏｓｍｉｎ心肌 ＳＰＥＣＴ显像诊断冠心病的灵敏度、特异性和准确率分别为９２．３％,６０％和７８．３％。结论：９９ｍＴｃ－Ｔｅｔｒｏｆｏｓｍｉｎ心肌灌注显像在冠心病诊断中具有较高的临床价值。     

门控心肌灌注显像诊断冠心病的临床价值

目的:探讨腺苷负荷99mTc-MIBI门控心肌灌注显像(G-MPI)后室壁运动和增厚率异常对冠心病的诊断价值。方法:对91例确诊或临床疑诊为冠心病患者行静息-腺苷负荷99mTc-MIBI G-MPI和非门控心肌灌注显像(MPI),两周内行冠状动脉造影(CAG),对其结果进行对比分析。结果:MPI诊断冠心病的灵敏度为85.3%,特异性为73.9%,G-MPI诊断冠心病灵敏度为92.6%,特异性为87.0%,结合腺苷负荷后局部室壁运动和增厚率评分可提高G-MPI诊断冠心病的灵敏度和特异性。结论:静息-腺苷负荷99mTc-MIBI G-MPI对冠心病的诊断有较高的灵敏度和特异性。     

99mTc-MIBI心肌灌注显像与冠状动脉造影诊断冠心病的对比分析

目的：探讨99mTc-MIBI心肌灌注显像对冠心病的临床诊断价值。方法：128例住院患者，男76例，女52例。年龄30～85（56.5±12.5）岁。同时进行99mTc-MIBI心肌灌注显像与冠状动脉造影（CAG）检查，将结果进行相关性分析。对上述患者预后进行了抽样临床随访。结果：99mTc-MIBI心肌灌注显像与CAG均阳性65例，99mTc-MIBI心肌灌注显像阳性、CAG阴性32例，99mTc-MIBI心肌灌注显像阴性、CAG阳性22例，99mTc-MIBI心肌灌注显像与CAG均阴性9例。一种检查阳性和99mTc-MIBI心肌灌注显像与CAG均阴性预后良好。99mTc-MIBI心肌灌注显像与CAG均阳性，CAG证实主要冠状动脉狭窄≥75％预后较差。结论：99mTc-MIBI心肌灌注显像与CAG相辅相成，对冠心病患者的诊断、指导治疗决策和判断预后有重要临床意义。     

心肌灌注显像在女性冠心病诊断中价值

目的评价心肌灌注显像对女性冠心病患者的诊断价值。方法 344例有胸痛、胸闷症状女性患者,行静息+药物负荷心肌灌注显像检测,并与冠状动脉造影结果进行对比分析。结果冠状动脉狭窄178例患者中心肌灌注显示异常者130例;冠状动脉造影无异常或不规则166例中心肌灌注显像异常50例,无异常116例;以冠状动脉造影结果为标准,心肌灌注显像对女性冠心病诊断的敏感度、特异度、阳性预测值、阴性预测值分别为73.0%,69.9%,72.2%,70.7%。结论心肌灌注显像对女性冠心病患者的诊断及是否进一步行冠状动脉造影的筛选有一定价值。     

Discordance between dipyridamole stress technetium-99m tetrofosmin single photon emission computed tomography and coronary angiography in patients with Kawasaki disease

Kawasaki disease (KD) is an acute vasculitis syndrome of unknown etiology that mainly affects the coronary arteries. The purpose of this study was to assess the agreement between dipyridamole stress technetium-99m tetrofosmin (Tc-TF) myocardial perfusion single photon emission computed tomography (SPECT) and coronary angiography in these patients. Twenty-nine children with KD were included in this study. All of the 29 children also received dipyridamole stress Tc-TF myocardial perfusion SPECT within 1 month of their coronary angiographic studies. The results showed that (1) 89.7% of children had negative coronary angiographic findings without significant coronary stenoses, and 10.3% of children had positive coronary angiographic findings with significant coronary stenosis; (2) 44.8% of children had negative Tc-TF myocardial perfusion SPECT findings without abnormal myocardial perfusion, and 55.2% of children had positive Tc-TF myocardial perfusion SPECT findings with abnormal myocardial perfusion; (3) 44.8% of children had both normal coronary angiographic and Tc-TF myocardial perfusion SPECT findings, and 10.3% of children had both abnormal coronary angiographic and Tc-TF myocardial perfusion SPECT findings; and (4) There was no significant agreement between coronary angiographic and Tc-TF myocardial perfusion SPECT findings. We concluded that poor agreement exists between coronary angiographic and Tc-TF myocardial perfusion SPECT findings with coronary stenoses and abnormal myocardial perfusion in children with KD.     

99mTc-MIBI心肌断层显像与冠状动脉造影诊断冠心病的对比分析

目的:探讨99mTc-MIBI心肌断层显像(SPECT)诊断冠心病(CAD)的临床价值。方法:60例患者同时进行99mTc-MIBI心肌断层显像(SPECT)和冠状动脉造影(CAG)检查,将结果进行对比分析。结果:以CAG为标准,SPECT诊断冠心病的敏感性93·18%,特异性50%,准确性指数81·67%,阳性预测值83·67%,阴性预测值72·73%。结论:SPECT与CAG从不同的角度诊断CAD符合率高。若CAG阳性则冠心病诊断成立,CAG与SPECT均阴性,可排除冠心病。     

A comparative evaluation of Tl-201 and Tc-99m sestamibi myocardial perfusion spect imaging in diabetic patients

Aim Myocardial perfusion scintigraphy (MPS) is an effective tool for early diagnosis of coronary artery disease (CAD) in type II diabetes mellitus (DM). The purpose of this study was to review the comparative findings of Tc-99m MIBI and Tl-201 MPS in defining normal and abnormal myocardial segments, type and extent of the perfusion defects with reference to coronary angiography findings in diabetic patients. Methods Thirty patients with type II DM who had abnormal Tc-99m MIBI MPS findings and underwent coronary angiography were included this study (20 male, 10 female; mean age was 64 ± 11 years). Those patients were also investigated with Tl-201 MPS thereafter. All scintigraphic images were evaluated semiquantitatively using a 20-segments myocardial model. The perfusion of myocardial segments, reversibility and severity of defects based on defect score were compared using the MIBI and Tl-201 images in relation to coronary angiography. Diffuse slow-washout of Tl-201 was also noted. Results A total of 600 myocardial segments were comparatively analyzed. Diagnostic concordance between both tracers in defining normal and abnormal perfusion on a segmental basis was 88% (κ = 0.71). The percentage of normal, reversible and non-reversible segments in the Tc-99m MIBI and Tl-201 study were 67–61%, 11–20% and 22–19% respectively. While the number of irreversible defects were similar for both tracers, more number of reversible defects were identified by Tl-201 MPS than Tc-99m MIBI (65 vs. 123, p = 0.001). No significant difference between the defect scores of both tracers was found. Conclusion MPS using both tracers offered agreement in defining or excluding perfusion abnormalities in a major part of the data. However, Tl-201 MPS yielded better detection rate of myocardial ischemia than Tc-99m MIBI MPS in diabetic patients.     

腺苷负荷心肌核素显像在冠心病诊断与介入治疗中的作用

目的探讨腺苷负荷心肌核素显像在冠心病诊断及介入治疗中的作用。方法冠心病的可疑患者,行腺苷负荷心肌核素显像,部分患者进行冠脉造影和介入治疗,介入治疗前后进行腺苷负荷心肌核素显像检查对比。腺苷负荷心肌核素显像采用单光子发射断层显像图像采集系统,腺苷总量为840μg/kg静脉泵入,3 min后静脉推注99mTc-MBI925 MBq,90 min后进行心肌断层显像,如果发现心肌显像异常,次日再行静息心肌显像。结果134例冠心病患者,年龄21~85(63.3±14.8)岁,男90例,女44例,进行腺苷负荷心肌核素显像,109例提示有心肌缺血现象,25例正常,诊断阳性率达81.3%。12例患者经过冠状动脉造影,有冠脉狭窄的患者行PCI,前后复查腺苷心肌核素显像,介入后心肌核素血流灌注较介入前明显改善(P<0.01)。结论腺苷负荷心肌核素显像在冠心病的诊断中起着重要的作用,其敏感性与特异性较高,同时在冠心病介入治疗前后疗效评价方面有一定的临床意义。     

Color-Encoded Semiautomatic Analysis of Multi-Slice First-Pass Magnetic Resonance Perfusion: Comparison to Tetrofosmin Single Photon Emission Computed Tomography Perfusion and X-Ray Angiography

BACKGROUND AND PURPOSE: Cardiovascular magnetic resonance (CMR) perfusion can accurately detect coronary artery disease (CAD). However, the absence of efficient, easy-to-use and reliable image analysis software is an obstacle to its introduction into clinical practice. The aim of this study was to evaluate new color-encoded semiautomatic software for analysis of first-pass CMR perfusion in comparison to tetrofosmin myocardial single photon emission computed tomography (SPECT), using X-ray angiography as the standard of truth for the detection of CAD. METHODS: Thirty-two patients underwent both SPECT and CMR perfusion at rest and adenosine stress. Twenty of these patients also underwent X-ray angiography. Off-line CMR image analysis consisted of six steps to generate a color display of the myocardial perfusion reserve index (MPRI). The MPRI color-maps were analyzed visually and compared to SPECT. RESULTS: In comparison to X-ray angiography overall accuracy was 87% for CMR and 77% for SPECT perfusion to detect significant CAD (stenosis > or =70%). In comparison with SPECT sensitivity was 80%, specificity 91%, and the overall agreement 89% for CMR. CONCLUSIONS: Post-processing of CMR perfusion data using new semiautomatic software to generate and display the MPRI visually as color-encoded images is feasible and fast. In this study it yielded higher accuracy than SPECT to detect significant CAD on X-ray angiography. Correlation between SPECT and CMR accuracy for detection of perfusion defects was high. This method may accelerate the time-consuming analysis of CMR perfusion data, thus enabling a more widespread clinical utility.     

CT和MRI在冠状动脉疾病诊断中的应用比较

目的比较心脏计算机断层扫描(CT)和心脏磁共振成像(MRI)在冠状动脉疾病的诊断的应用方法。方法 2008年2月到2010年2月我们前瞻性的连续选择了94例已知或者疑似CAD的患者,进行MRI心肌灌注、传统的冠状动脉造影、前瞻性ECG-门控的冠脉CTA分析,并比较了MRI心肌灌注和CA、前瞻性ECG-门控冠脉CTA加MRI心肌灌注和CA;评估了血流动力学相关狭窄。结果 MRI心肌灌注揭示了60/94(63.8%)的人具有心肌缺损(灌注缺损或梗阻)。CA揭示了94例病人中有66例冠状动脉中有150例大于50%直径的狭窄。平均每名患者的有效辐射剂量为2.5±1.1mSv。检测冠状动脉狭窄大于50%,在CA的敏感性,特异性,NPV,PPV和准确率低于MRI心肌灌注以及冠脉CTA加MRI心肌灌注。其中1例病人在CD伴随着MRI心肌灌注的LAD灌注缺损,在冠脉CTA被判定为没有明显狭窄。结论在诊断血流动力学相关的CAD,冠状动脉CTA可能取代CA。     

Diagnostic accuracy of quantitative cardiac MRI evaluation compared to stress single-photon-emission computed tomography

Background: Cardiac MRI (cMRI) perfusion is a promising non-invasive tool to assess myocardial ischemia. The accuracy of quantitative cMRI perfusion has been recently demonstrated, but to date no previous study has compared this technique with stress single-photon-emission computed tomography (SPECT). The aim of this study was to evaluate the diagnostic accuracy of myocardial perfusion reserve (MPR) based on cMRI compared with SPECT. Methods: We examined 24 patients who underwent coronary angiography, stress SPECT and cMRI perfusion. Qualitative assessment of both SPECT and cMRI images, quantification of cMRI perfusion, and quantitative coronary angiography (QCA) were independently performed. MPR was calculated using Fermi deconvolution technique. Accuracy of quantitative and qualitative data was examined to detect > 50% diameter stenosis (DS) by QCA. Results: Qualitative analysis was obtained in 198 segments and quantitative analysis was performed in 171 segments. Significant coronary artery disease (CAD) was present in 81.8% of patients. Visual cMRI assessment yielded sensitivity of 74.4% and specificity of 79.4% to predict > 50%DS, while SPECT showed sensitivity of 67.4% and specificity of 81.3%. The sensitivity for SPECT in the right coronary artery territory and apex was low compared to cMRI. Sensitivity and specificity for detection of significant CAD were 89.5% and 46.6% for MPR (cutoff 1.92). Area under the curve was 0.75 for MPR (P < 0.01). Conclusions: The diagnostic accuracy of qualitative examination of perfusion cardiac MRI and stress SPECT were comparable. The high sensitivity and low operator dependency of quantitative cMRI makes it an attractive tool to evaluate myocardial perfusion.     

MRI检测活性心肌及其与冠状动脉造影、SPECT和PET对比研究

目的：分析MRI对冠心病患者心肌活性的诊断价值并与冠状动脉造影、SPECT和PET结果对比。方法：应用MRI对21例临床符合冠心病的患者进行检查，并将结果与冠状动脉造影、SPECT和PET检查结果对照。结果：MRI静息心肌灌注扫描检出的缺血节段比狭窄冠状动脉的供血节段少但无统计学差异（Z=-1.732，P=0．083）；比SPECT心肌灌注扫描检出的缺血节段多且有统计学差异（Z=-3．691，P=0．000）。SPECT心肌灌注扫描检出的缺血节段比狭窄冠状动脉的供血节段少且有统计学差异（Z=-3．029，P=0．002）。以正电子发射断层显像（PET）结果为标准，MR延迟扫描检测活性心肌的灵敏度为97．6％，特异度为98．4％，总符合率为98．2%，Kappa值为0．953。MR延迟扫描检出的活性心肌比PET检出的少但无统计学差异（Z=-0．209，P=0．835）。结论：MR心脏检查清晰显示心肌梗死的位置、程度和附壁血栓情况，并可对左室室壁运动进行直观显示。常规SPECT心肌灌注显像由于空间分辨率低明显低估心肌缺血范围。心肌PET显像空间分辨率低，无法显示心肌梗死的透壁程度，且不能直观显示室壁运动情况。