目的 分析超声心动图(UCG)与双 源CT(DSCT)在先天性心脏病(CHD)术前诊 断中的应用价值。方法 回顾性分析2016 年1月至2017年5月我院同期行UCG、DSCT 检查的50例CHD患者的临床资料，观察图 像特点，比较UCG、DSCT测量所得血流动 力学参数[主动脉根部内径(AORD)、左房 内径(LAD)、左室舒张末期内径(LVDD)、 左室收缩末期内径(LVDS)、左室射血分数 (LVEF)]、收缩末期图像参数[左肺动脉内 径(LPA)、右肺动脉内径(RPA)、膈肌水 平降主动脉内径(DAO)、McGoon比值]， 并以手术结果为准，分析UCG、DSCT、 UCG+DSCT的诊断准确率。结果 UCG、DSCT 测量所得AORD、LAD、LVDD、LVDS、LVEF 及DAO比较差异无统计学意义(P＞0.05)， 而DSCT收缩末期LPA、RPA、McGoon比值大 于UCG(P＜0.01)；UCG、DSCT、UCG+DSCT 对心脏部分、心脏与大血管连接部分的 诊断准确率两两比较差异无统计学意义(P ＞0.05)，而DSCT、UCG+DSCT对大血管部 分的诊断准确率(90.38%、96.16%)高于 UCG 73.08%(P＜0.05)，UCG+DSCT总的诊 断准确率95.56%高于UCG 89.24%、DSCT 91.77%(P＜0.05)。结论 UCG与DSCT在CHD 术前诊断中均有一定应用价值，后者对大 血管诊断准确率高于前者，两者结合有助 于进行全面、准确诊断，值得在临床推广 实践。

Objective To analyze the application values of ultrasonic cardiogram (UCG) and dual-source CT (DSCT) in the preoperative diagnosis of congenital heart disease (CHD). Methods The clinical data of 50 cases of CHD patients treated with UCG and DSCT examinations in our hospital from January 2016 to May 2017 were retrospectively analyzed. The image features were observed, and the hemodynamic parameters measured by UCG and DSCT [aortic root diameter (AORD), left atrial diameter (LAD), left ventricular end diastolic diameter (LVDD), left ventricular end systolic diameter (LVDS), left ventricular ejection fraction (LVEF)] and the end systolic image parameters [left pulmonary artery diameter (LPA), right pulmonary artery diameter (RPA), diaphragmatic level reduced aortic diameter (DAO) and the McGoon ratio] were compared. And the diagnostic accuracy of UCG, DSCT and UCG+DSCT was analyzed based on the results of surgery. Results There was no significant difference in the AORD, LAD, LVDD, LVDS, LVEF and DAO measured by UCG and DSCT (P>0.05), but the LPA, RPA and McGoon ratio at DSCT end-systole were greater than those by UCG (P<0.01). There was no statistically significant difference in the accuracy in the diagnosis of cardiac part, and the linking part between the heart and large blood vessel by any two of UCG, DSCT and UCG+DSCT (P>0.05). The accuracy in the diagnosis of large blood vessel was 90.08% by DSCT and 96.16% by UCG+DSCT, which was higher than that by UCG with 73.08% (P<0.05). The overall diagnostic accuracy with 95.56% by UCG+DSCT was higher than that by UCG with 89.24% and by DSCT with 91.77 % (P<0.05). Conclusion UCG and DSCT have certain value in the preoperative diagnosis of CHD. The latter one has higher diagnostic accuracy than the former one in the diagnosis of large blood vessels, and the combination of the two can be helpful for the comprehensive and accurate diagnosis and is worthy of clinical promotion and practice.