电子束CT冠状动脉成像同血管造影的对比

目的：评价电子束CT(EBCT)冠脉增强扫描对冠状动脉狭窄的诊断意义．方法：55例患分别行EBCT增强扫描和冠状动脉血管造影术(CAG)，并由两位不知造影结果的医师进行阅片，与CAG结果进行对照．结果：EBCT判断狭窄的灵敏度是：左主干96％，左前降支89％，左回旋支71％．右冠80％，对明显狭窄的58支冠脉(管腔狭窄≥50％)有46支判断正确，灵敏度79％，127支无明显病变的冠脉有114支判断正确，特异度是90％(P＜0．001)．结论：EBCT增强扫描及其三维重建与冠脉血管造影结果具有高度的相关性．通过经静脉增强造影，EBCT可以清楚地显示冠状动脉并判断管腔的狭窄，尤其是重度狭窄．     

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。     

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。     

双源CT在冠心病诊断中的价值

目的 以侵入性的冠状动脉造影（ICA）为金标准,研究双源CT（DSCT）冠状动脉血管成像在诊断冠状动脉狭窄时的敏感性和特异性,评估其在冠心病筛选中的可行性。方法 回顾性分析200例冠心病患者（包括30例心律失常患者）的临床资料。入选患者均先后进行DSCT和ICA检查,两项检查之间间隔不超过3个月。以ICA为金标准,评价DSCT冠状动脉血管成像在诊断冠心病中的诊断价值。结果 200例冠心病患者中,158例经ICA证实存在冠状动脉狭窄（管腔狭窄≥50%）,而DSCT冠状动脉血管成像诊断161例,其诊断有意义冠状动脉狭窄的敏感性为98.1%（155/158）,特异性为85.7%（36/42）。评估的2 000段冠状动脉中,ICA证实326段存在冠状动脉狭窄（管腔狭窄≥50%）,DSCT诊断326段,敏感性为96.3%（314/326）,特异性为99.3%（1662/1674）。两者结果间差异均无统计学意义(P＞0.05)。并且DSCT对冠状动脉不同程度狭窄的诊断有极高的阴性预测值（均＞99%）。 结论 与ICA相比,DSCT对冠状动脉狭窄,尤其是无钙化的冠状动脉狭窄有较高的敏感性、特异性和极高的阴性预测值,且适用人群大为增加,因此,可以考虑将DSCT冠状动脉成像作为冠心病的筛选手段。     

双源CT在冠心病诊断中的价值

目的 以侵入性的冠状动脉造影（ICA）为金标准,研究双源CT（DSCT）冠状动脉血管成像在诊断冠状动脉狭窄时的敏感性和特异性,评估其在冠心病筛选中的可行性.方法 回顾性分析200例冠心病患者（包括30例心律失常患者）的临床资料.入选患者均先后进行DSCT和ICA检查,两项检查之间间隔不超过3个月.以ICA为金标准,评价DSCT冠状动脉血管成像在诊断冠心病中的诊断价值.结果 200例冠心病患者中,158例经ICA证实存在冠状动脉狭窄（管腔狭窄≥50%）,而DSCT冠状动脉血管成像诊断161例,其诊断有意义冠状动脉狭窄的敏感性为98.1%（155/158）,特异性为85.7%（36/42）.评估的2 000段冠状动脉中,ICA证实326段存在冠状动脉狭窄（管腔狭窄≥50%）,DSCT诊断326段,敏感性为96.3%（314/326）,特异性为99.3%（1662/1674）.两者结果间差异均无统计学意义（P＞0.05）.并且DSCT对冠状动脉不同程度狭窄的诊断有极高的阴性预测值（均＞99%）. 结论与ICA相比,DSCT对冠状动脉狭窄,尤其是无钙化的冠状动脉狭窄有较高的敏感性、特异性和极高的阴性预测值,且适用人群大为增加,因此,可以考虑将DSCT冠状动脉成像作为冠心病的筛选手段.     

负荷心肌灌注显像在女性冠状动脉心脏病诊断中的应用价值

目的评价负荷心肌灌注显像对女性冠状动脉心脏病（冠心病）的诊断价值。方法回顾分析了259例在北京阜外心血管病医院同时进行了负荷心肌灌注显像和冠状动脉造影的女性患者（间隔时间〈60d）,平均年龄（60±8）岁。其中227例进行了运动试验心肌灌注显像,32例进行了药物负荷心肌灌注显像。结果以冠状动脉管径狭窄≥50％为诊断标准,在接受运动试验心肌灌注显像检查的227例患者中,79例冠状动脉造影显示明显的冠状动脉狭窄病变,其中单支病变33例,双支病变23例,3支病变23例。累及左冠状动脉前降支67支,左冠状动脉回旋支41支,右冠状动脉40支,左主干8支。运动试验心肌灌注显像诊断女性冠心病的灵敏度为63％,特异性为97％,准确性为85％。诊断单支、双支和3支冠状动脉病变患者的灵敏度分别为61％,52％和78％。按运动试验是否达到终止指标,将227例患者分为2组,即运动试验达到终止指标组（n=137）和运动试验未达到终止指标组（n=90）。在运动试验达到终止指标组,运动试验心肌灌注显像诊断女性冠心病的灵敏度为86％。而在运动试验未达终止指标组,诊断灵敏度则为38％。在接受药物负荷心肌灌注显像检查的32例患者中,13例冠状动脉造影显示明显的冠状动脉狭窄病变。药物负荷心肌灌注显像诊断女性冠心病的灵敏度为85％,特异性为84％,准确性为84％。结论负荷心肌灌注显像可以有效诊断女性冠心病,且药物负荷心肌灌注显像更适合于运动耐力受损的老年女性患者。     

心脏融合显像定量评价功能相关冠状动脉狭窄的临床研究

目的利用无创性融合影像技术对冠状动脉粥样硬化性心脏病(以下简称冠心病)进行筛选诊断,旨在评价心脏融合显像MPI/CCTA用于鉴别功能相关冠状动脉(以下简称冠脉)狭窄性病变的诊断效能及其临床价值。方法选取怀疑或确诊为冠心病的患者78例,均行常规两日法腺苷负荷/静息心肌灌注显像(myocardial perfusion imaging,MPI)和同机冠状动脉CT成像(coronary computed tomography angiography,CCTA),30 d内完成冠脉造影(coronary angiography,CAG)。MPI:采用心肌15分段法对心肌血供做定性及半定量评价;CAG和CCTA:按常规将冠脉狭窄≥50%定义为临床有意义。以MPI/CAG作为标准对MPI/CCTA对冠脉狭窄致心肌血供异常的诊断效能进行评价。结果 78例患者中,MPI结果显示正常/异常为6/72例,其中66例为心肌缺血,6例为心肌梗死;根据3支主要冠脉血管的相应供血心肌节段划分,有可逆性缺损的节段:左前降支(left anteriordescending artery,LAD)55段、左旋支(left circumflex artery,LCX)14段、右冠状动脉(right coronary artery,RCA)11段,有固定性缺损的节段:LAD 4段、RCA 3段。CCTA结果显示:冠脉正常/异常为22/56例,78例患者共有234支主要冠脉,其中有74支冠脉狭窄≥50%,106支冠脉正常。MPI/CCTA融合影像结果显示:冠脉正常/异常(存在功能相关冠脉狭窄)为22/56例,与MPI/CAG对照,得到敏感度、特异度、准确度、阳性预测值、阴性预测值分别为94.33%、72.00%、87.18%、87.71%、85.71%。基于234支主要冠脉,MPI/CCTA融合影像与MPI/CAG对照,均异常(真阳性)55段/支,MPI/CCTA正常而MPI/CAG异常(假阴性)7段/支,MPI/CCTA异常而MPI/CAG正常(假阳性)13段/支,MPI/CCTA及MPI/CAG均正常(真阴性)159段/支,诊断敏感度、特异度、准确度、阳性预测值、阴性预测值分别为88.71%、92.44%、91.45%、80.89%、95.78%。46例施行冠脉血管重建术患者均确定有功能相关冠脉狭窄,但是在67支行冠脉血管重建术的冠脉中,有25支(冠脉搭桥术CABG:8/22,36.36%;冠脉支架术PCI:17/45,37.80%)冠脉明显狭窄部位与心肌缺血区域并不匹配。结论本研究显示心脏融合影像(MPI/CCTA)用于评价功能相关冠脉狭窄具有较高的诊断效能,其优势在于可无创性评价冠脉解剖结构和功能状态,明确冠脉狭窄与其功能之间的关系,有望成为冠心病诊断,指导治疗方案的决策的首选方法。     

核素心肌灌注断层显像检查与冠状动脉造影术对冠心病的诊断价值

[目的 ]评价99mTc甲氧基异丁基异腈心肌灌注断层显像检查诊断冠心病的准确性 ,并对心肌灌注断层显像检查与冠状动脉造影术所显示的心肌损害程度间的关系进行分析 .[方法 ]对 10 3例冠心病患者行99m Tc 甲氧基异丁基异腈心肌灌注断层显像检查和冠状动脉造影检查 ,对其结果进行对比分析 .[结果 ]冠状动脉造影术对冠心病的诊断阳性率为 96 % ,假阴性有 3例 ;心肌灌注断层显像检查对冠心病诊断的敏感性较高 ,为 94 % ,特异性较低 ,为72 % .心肌灌注断层显像检查对单支病变血管的检出灵敏度高于双支病变及 3支病变 .心肌灌注断层显像检查对前降支的检出灵敏度为 86 % ,左旋支为 6 2 % ,右冠状动脉为 82 % .心肌灌注断层显像检查与冠状动脉造影检查的结果之间存在明显差异 .[结论 ]冠状动脉造影检查可了解冠状动脉血管树的解剖 ,心肌灌注断层显像检查则从病理生理学角度提供心肌灌注和存活状况的信息 ,两者不能相互替代 ,结合此 2种检查可使冠心病诊断的准确性得到进一步的提高     

数字荧光透视检出冠状动脉钙化在冠心病诊断中的应用

目的：评价数字荧光透视检出冠状动脉钙化（ＣＡＣ）对诊断冠心病的价值。方法：１１４例患者于冠状动脉造影前行数字荧光透视检查，以冠状动脉造影存在１支以上的管径狭窄≥５０％为诊断冠心病标准。结果：１１４例患者中，冠心病患者６３例，无冠心病患者５１例。冠心病组ＣＡＣ阳性率明显高于无冠心病组（ｐ〈０．００１）；以数字荧光透视有无ＣＡＣ判断冠心病的敏感性、特异性及准确性分别为７１．４％，８６．３％，７８．１％     

e-Speed 电子束CT血管造影对冠状动脉疾病诊断的临床应用

目的 总结e-Speed电子束CT(electron beam computed tomography, EBCT)冠状动脉造影检查结果,探讨EBCT血管造影的图像质量及其对冠状动脉疾病的诊断价值.方法 2005年4月～2006年7月疑诊冠状动脉疾病或健康查体来我院行e-Speed电子束CT冠状动脉检查病例356例,所有受检者均行EBCT冠状动脉平扫,319例行EBCT冠状动脉造影检查.结果 以容积再现(VR)和曲面重建(CPR)图像为评价主要依据,参考其他图像后处理结果,将EBCT冠状动脉造影图像质量分为6个等级.优良(6～4分)图像为270例,占84.6%,3分图像37例,占11.6%,2分以下图像12例,占3.8%,2分以下图像不能进行诊断.能进行诊断的307例中,冠状动脉未见异常者211例(68.7%),冠状动脉狭窄者95例(30.9%),冠状动脉先天性异常1例.结论 EBCT血管造影可清晰显示冠状动脉主干及主要分支,判断冠状动脉有无狭窄及其程度,在冠状动脉疾病诊断和介入治疗筛选方面可部分取代传统的导管法造影检查.     

负荷MR心肌灌注成像检测冠心病心肌缺血与冠状动脉造影及99mTc-SPECT对比的初步研究

目的 探讨负荷MR首过心肌灌注成像检测冠心病的临床价值.方法 33例经冠状动脉造影确诊的冠心病患者,男22例,女11例,平均年龄58.32岁.其中15例常规行静息-负荷99m^Tc-SPECT心肌灌注显像.采用IR-turboFLASH序列行静息-负荷MR首过心肌灌注成像及延迟期心肌灌注成像,目测定性分析心肌灌注图像,将分析结果与冠脉造影及99m^Tc-SPECT进行比较,计算其敏感性和特异性.结果 28例（28/33）191段心肌灌注减低,其中92段（92/191）可逆性灌注减低,99段（99/191）固定灌注减低;51支冠状动脉主干或其主要分支狭窄,MR首过心肌灌注成像42支狭窄冠脉供血区心肌灌注减低.以冠脉造影为参考标准,MR首过心肌灌注成像检测狭窄50%以上冠状动脉病变的敏感性及特异性分别为：82.35%和91.67%.MR首过心肌灌注成像与99m^TC-MIBI SPECT具有很好的一致性,两者符合率为：92.5%.以99m^TC-MIBI SPECT为参考标准,MR首过心肌灌注成像检测冠心病的敏感性及特异性分别为：94.74%、92.55%.结论 负荷MR首过心肌灌注成像能有效检测冠心病心肌缺血;MR首过心肌灌注成像定性评价冠心病心肌缺血具有较高的临床实用价值.     

多层螺旋CT冠脉成像与导管法冠状动脉造影对比观察

目的与导管法冠状动脉造影结果对照，评价多排螺旋CT对冠心病的诊断价值。方法30例临床诊断为冠心病的患者，在1周内分别进行多排螺旋CT检查和导管法冠状动脉造影检查，对冠脉狭窄情况进行评估。结果30例患者冠脉造影显示内径〉12min的312个冠状动脉节段中，冠状动脉CT图像质量能满足影像学评价为260节段，占83．3％；不能满足影像学评价为52节段，占16．7％。冠脉造影显示有42节段血管直径狭窄〉150％，冠脉CT显像显示有35节段血管直径狭窄〉150％。与冠脉造影比较，冠脉CT显像的敏感性8313％，特异性96．3％，阳性预测价值81．4％，阴性预测价值96．8％。冠脉造影和冠脉CT显像均可较好地显示冠状动脉支架的位置和形态结构。结论MSCT冠脉显像对冠状动脉狭窄的显示具有较高的准确性，通过多种图像后处理技术能够较好地显示冠状动脉支架的位置和形态结构，MSCT冠脉显像具有广阔的应用前景。     

电子束CT与选择性冠状动脉造影的节段对比分析

[目的]探讨电子束CT(EBCT)造影对冠状动脉各节段病变诊断价值的差异.[方法]同期行选择性冠状动脉造影和EBCT冠状动脉造影检查的患者38例,对照选择性冠状动脉造影的结果计算EBCT造影检测冠状动脉各节段狭窄病变的准确性.[结果]①选择性冠状动脉造影可清晰显影的332个节段中,EBCT造影可清晰显示和评价占264段(79.5%),68段(20.5%)显影不清.左主干和前降支可评价节段的比例显著高于左回旋支和右冠状动脉(P＜0.05或0.01),同一支血管中近段可评价的比例显著高于远段(P＜0.05或0.01).②EBCT造影检测节段病变总的敏感性、特异性、准确性、阳性和阴性预测值分别为81.0%、95.9%、93.6%、79.1%和96.4%;EBCT造影对诊断左主干和左前降支各节段病变的价值高于左回旋支和右冠状动脉,检测冠状动脉近段病变的价值高于远段.[结论]电子束CT冠状动脉造影对冠状动脉的评价和病变检测受解剖部位和血管大小的影响,检测左主干和左前降支各节段病变的价值高于左回旋支和右冠状动脉,对冠状动脉近段病变的诊断价值高于远段.     

e-Speed电子束CT对冠状动脉粥样硬化心脏病的诊断价值

目的总结e-Speed电子束CT(electron beam computed tomography,EBCT)冠状动脉检查结果,探讨EBCT冠状动脉造影的图像质量及其对冠心病的诊断价值.方法疑诊冠心病或健康查体来我院行e-Speed电子束CT冠状动脉检查病例115例,所有受检者均行EBCT平扫,92例行EBCT血管造影检查.结果冠状动脉钙化积分,60岁以前较低,60岁以后逐渐增高,70岁以后明显增高.EBCT冠状动脉造影检查优良图像为79例(85.9%),不满意图像为13例(14.1%);根据EBCT冠状动脉造影结果,85.9%病例可做出明确诊断,10.9%病例只能做出大致诊断,3.2%病例不能做出诊断.结论EBCT对诊断冠状动脉粥样硬化性心脏病有重要价值,EBCT冠状动脉造影在冠状动脉病变诊断和介入治疗筛选方面可部分取代传统的插管法造影检查.     

Assessment of coronary artery disease with second harmonic myocardial perfusion contrast echocardiography

Objectives To assess the relationship between myocardial regional perfusion using second harmonic myocardial contrast echocardiography (MCE) by venous injection of Levovist and coronary artery stenosis detected by coronary angiography to determine whether MCE can be used to detect coronary artery disease (CAD) and its sensitivity and specificity for detecting CAD.Methods Thirty-six patients who underwent coronary artery angiography and MCE formed the study groups.Ten myocardial segments (5 each in the apical two- and four-chamber views) from the images were scored for detecting myocardial perfusion as follows: 1, normal perfusion; 2, decreased perfusion; and 3, perfusion defect.The arteries were classified as normal or diseased.The diseased arteries were classified into three groups according to the perfusion scores.Results There were significant differences in coronary diameter stenosis among the different perfusion score groups (P<0.001).There were 10 total occluded arteries, and the myocardial perfusion scores were different because of different collateral circulation.In the normal perfusion group (Group A), the coronary diameter stenosis was 65%±12%, and the myocardial perfusion score index was 1±0.00.In the decreased perfusion group (Group B), the average coronary diameter stenosis was 82%±8%, and the myocardial perfusion score was 1.93±0.16.The diameter stenosis was less than 85% in 63 % of the coronary arteries (including diameter stenosis ≤75% in 12% of the vessels).The diameter stenosis was 85%-90% in 22% of the coronary arteries and >90% in 15% of the arteries.In the perfusion defect group (Group C), the average diameter stenosis was 90%±6%, and the myocardial perfusion score index was 2.89±0.24.The diameter stenosis was　≥85% in 94% of the coronary arteries, and the diameter stenosis was <85% and >75% only in 6% of the coronary arteries.The overall sensitivity and specificity of MCE in identifying angiographic coronary diameter stenosis was 67% and 100%, respectively.The false negative rate was 32.6% for the 108 coronary arteries.Further subdivided analysis showed the sensitivities in Groups A, B and C were 0, 100%, and 100%, respectively.The sensitivity increased with increased lumen diameter stenosis of coronary arteries.Conclusions There is a close relationship between coronary artery stenosis and MCE perfusion scores.MCE with venous injection of new generation contrast can define the presence of CAD and lesion graded classifications.Some disagreements between perfusion score and coronary diameter of stenosis may indicate other factors such as different collateral circulation, which should be further investigated.As artery stenosis increases, the sensitivity of MCE is increased.     

Technetium-99m-Sestamibi SPECT myocardial perfusion imaging in patients with complete left bundle branch block

BACKGROUND: Diagnosis of coronary artery disease (CAD) in patients with left bundle branch block (LBBB) is considered a challenge in cardiology due to low accuracy of noninvasive methods such as basal and exercise stress test. Recently, myocardial perfusion imaging showed attainment of higher sensitivity and specificity. Scintigraphy with thallium-201 has been widely used in these patients. Few have used technetium-99m-Sestamibi and single photon emission computed tomography (SPECT). The aim of the study was to assess the diagnostic value of Tc-99m Sestamibi SPECT myocardial perfusion imaging in patients with complete LBBB. METHODS: We studied 57 consecutive patients with complete LBBB using Tc-99m-Sestamibi SPECT and treadmill or dipyridamole stress to evaluate CAD. Eighteen patients also underwent coronary angiography. Perfusion defects were classified as fixed or reversible. RESULTS: Prevalence of resting perfusion abnormalities in anterior, septal, and apical regions was 51, 56, and 19%, respectively. Sensitivity for detecting >50% left anterior descending artery (LAD) stenosis was 67 and 56% for anterior or septal defects, and 56% for specificity. Apical perfusion abnormality showed 21% sensitivity and 89% specificity. Among six patients with reversibility and who underwent coronary angiography, all had >50% LAD stenosis. CONCLUSIONS: With Tc-99m-MIBI SPECT imaging, prevalence of anteroseptal perfusion abnormalities was >50% in patients with LBBB. The test has moderate sensitivity and specificity for LAD disease. Absence of apical defect is specific for excluding LAD disease. Reversible changes in anteroseptal wall should be considered as an indicator of ischemia in this territory.     

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     

99Tcm-MIBI心肌灌注断层显像与冠脉造影诊断冠心病的对比分析

目的探讨99Tcm-MIBI心肌灌注断层显像(SPECT)诊断冠心病(CAD)的临床价值.方法 72例患者,同时进行99Tcm- MIBI心肌灌注断层显像(SPECT)和冠脉造影(CAG)检查,将结果进行对比分析.结果以CAG作对照,SPECT诊断冠心病的敏感性96.36%、特异性58.82%,准确性指数87.50%、阳性预测值88.33%、阴性预测值88.33%.结论 SPECT与CAG从不同的角度诊断CAD,符合率较高.在冠心病的诊断中,两者应互相结合,而不能替代.若CAG阳性则冠心病诊断肯定,CAG与SPECT均阴性,可以排除冠心病,CAG与SPECT结果不一致时,须结合临床小心做出诊断.     

基于工作站的CT-FFR对评估冠状动脉功能性狭窄的临床初步探究

目的 以负荷核素心肌灌注显像(single photon emission computedtomography/myocardial perfusion imaging,SPECT/MPI)为标准,探讨基于工作站的CT-冠状动脉血流储备分数(CT-fractional flow reserve,CT-FFR)对于诊断...