目的探讨电子计算机断层 扫描血管造影(Computed Tomography Angiography，CTA)诊断冠状动脉狭窄的 临床价值。方法 随机选取我院2016年10 月-2017年10月收治的82例疑似冠心病患 者作为研究对象，对其行CTA检查与数 字减影血管造影(Digital Subtraction Angiography，DSA)，将DSA检查结果 作为金标准进行比较。结果 DSA检查 出79例阳性与3例阴性，CTA检查出75 例冠状动脉阳性与7例阴性，灵敏度为 96.10%(74/77)，特异度80.00%(4/5)，准 确性95.12%(78/82)，Kappa值为0.64； CTA与DSA对冠状动脉狭窄程度的检查结 果比较无统计学意义(P＞0.05)；CTA 检查左主干灵敏度为95.24%(40/42)， 特异度100.00%(40/40)，准确性 97.56%(80/82)，Kappa值为0.95； 左前降支灵敏度为95.00%(57/60)， 特异度100.00%(22/22)，准确性 96.34%(79/82)，Kappa值为0.91； 左回旋支灵敏度为92.16%(47/51)， 特异度96.77%(30/31)，准确性 93.90%(77/82)，Kappa值为0.87；右 冠状动脉灵敏度为95.24%(40/42)， 特异度100.00%(40/40)，准确性 97.56%(80/82)，Kappa值为0.95。结论 CTA能够清楚显示患者冠脉病变情况，准 确性高，敏感性及特异性良好，能够辅助 诊断并且筛查冠状动脉狭窄。

Objective To explore the clinical value of computed tomography angiography (CTA) in the diagnosis of coronary artery stenosis. Methods A total of 82 patients with suspected coronary heart disease who were admitted to the hospital from October 2016 to October 2017 were randomly selected as the subjects. They were examined by CTA and digital subtraction angiography (DSA), and the results were compared with results of DSA as the golden standard. Results There were 79 cases positive and 3 cases negative detected by DSA, while there were 75 cases of coronary arteries positive and 7 cases negative detected by CTA. The sensitivity, specificity, accuracy and Kappa value were 96.10% (74/77), 80.00% (4/5), 95.12% (78/82) and 0.64, respectively, without significant difference between CTA and DSA in detecting the degree of coronary artery stenosis (P>0.05). The sensitivity, specificity, accuracy and Kappa value of CTA for left main stem were 95.24% (40/42), 100.00% (40/40), 97.56% (80/82) and 0.95, respectively, those for left anterior descending branch were 95.00% (57/60), 100.00% (22/22), 96.34% (79/82) and 0.91, for left circumflex branch were 92.16% (47/51), 96.77% (30/31), 93.90% (77/82) and 0.87, and for right coronary artery were 95.24% (40/42), 100.00% (40/40), 97.56% (80/82) and 0.95, respectively. Conclusion CTA can clearly display coronary artery lesions, with high accuracy, sensitivity and specificity. It can help diagnosis and screening of coronary artery stenosis.