王金会 秦小娜 王晓艳
【摘要】目的 分析冠状动脉CT血管造影(CTA)与冠脉造影(CAG)的差异,探讨冠状动脉CTA对冠心病的临床诊断价值。方法 分别对冠状动脉钙化和积分、斑块和狭窄、心肌桥-壁血管显示、支架术前、术后、心脏不良事件等进行评估对比并分析记录。结果 冠状动脉CTA无法看到分支血管及小血管病变,清晰和准确程度不如冠脉造影。结论 冠状动脉CTA易漏诊,受影响产生伪像的几率大,因此冠脉造影值得临床推广与运用。
【关键词】冠状动脉CTA;冠脉造影;对比
【中图分类号】R541.4 【文献标识码】B 【文章编号】ISSN.2095-6681.2015.014.00.03
【Abstract】Objective To analyze the coronary CTA and coronary angiography differences investigate the clinical diagnostic value of CTA artery for coronary artery disease.Methods In contrast to respectively coronary artery calcification and integral, plaque and stenosis and display myocardial bridge and vessel wall and stent with preoperative, postoperative and adverse cardiac events such as for comparative evaluation and analysis of the recorded. Results Coronary artery CTA can not see the branch of the blood vessel and small vessel disease, clear and accurate degree is inferior to the coronary angiography. Conclusion Coronary artery CTA is likely to be misdiagnosed,
artifacts of high probability, so coronary angiography worth more for a wide range of clinical application.
【Key words】Coronary CTA; Coronary angiography;Contrast
對比冠状动脉CTA和CAG之间的差异,分析冠状动脉CTA对于冠心病诊断的敏感性和特异性。具体如下。
1 冠状动脉钙化和积分的评估
CAG对钙化的敏感性不及冠状动脉CTA敏感,CT钙化斑块的敏感性为89%~95%,特异性为94%~96%,纤维斑块82%~92%,特异性87%,易损斑块的主要特征:低密度、偏心或溃疡形成,斑块部位血管正性重构。冠状动脉CTA检查可以确定斑块性质。血栓的CT值约20 Hu,脂质斑块CT值约
50 Hu,纤维斑块CT值约70~120 Hu。钙化斑块CT值为130 Hu以上。脂质斑块为不稳定斑块,临床需高度重视及监测,有临床资料提示对于不稳定斑块应当尽快实施介入治疗,以防止破裂形成血栓。依据CTA值对非钙化进一步分类存在不足,世界范围内的大多数多排螺旋(MD)CT有关于冠脉成像的研究都提示钙化是影响结果判断的主要因素[1]。Rubinshtein等通过研究发现,100例患者中有29例存在钙化,导致无法对冠脉成像情况进行评价;同时,Cademartiri等学者通过16-MDCT对冠心病患者……