建立胎儿无顶冠状静脉窦（UCS）的产前超声诊断方法。

利用永存左上腔静脉（PLSVC）伴冠状窦扩张胎儿的心脏解剖数据库建立观察冠状窦切面的方法。对2018年1月至2025年3月在北京大学人民医院就诊的可疑UCS胎儿，利用建立的显示冠状窦切面的超声扫查方法进行诊断，总结使用该方法进行产前超声诊断UCS的效果。

通过解剖数据库建立的观察冠状窦切面的超声扫查方法：经冠状窦长轴的心脏横切面显示冠状窦长轴；四腔心切面显示左房室沟处冠状窦短轴；经左房室沟的旁矢状切面显示冠状窦短轴；经双心房冠状切面显示冠状窦长轴。诊断要点：以上任意切面上冠状窦窦壁连续性中断即诊断为UCS，彩色多普勒成像显示异常血流束有助于进一步明确诊断。利用以上产前超声扫查冠状窦方法共诊断10例UCS胎儿。

通过已有解剖数据建立的显示胎儿冠状窦切面的超声扫查方法可以指导产前超声医师进行UCS的筛查，提高了UCS的产前诊断准确率和效率。

To establish a method of prenatal ultrasound diagnosis of fetal unroofed coronary sinus (UCS).

A method for observing sections of the coronary sinus was established by using a fetal cardiac anatomy database of persistent left superior vena cava (PLSVC) with coronary sinus dilation. For fetuses with suspected UCS in Peking University People's Hospital from January 2018 to March 2025, the established method of displaying coronary sinus sections was utilized for diagnosis, and the efficacy of the prenatal ultrasound diagnosis method for UCS was analyzed.

The classical coronary sinus sections included: (1) long-axis view: the heart transverse section along the coronary sinus long axis could view its full length; (2) four-chamber view: the short axis of the coronary sinus is displayed at the left atrioventricular groove; (3) parasagittal view: the short axis of the coronary sinus is visualized through the left atrioventricular groove; and (4) trans-biatrial coronal view: the long axis of the coronary sinus is demonstrated. A diagnosis of UCS can be made by the presence of discontinuity of coronary sinus sinus wall on any of the above sections, and abnormal blood flow on color Doppler flow imaging can further support the diagnosis. Using this standardized prenatal ultrasound approach, 10 fetuses with UCS were successfully diagnosed.

By reconstructing the existing anatomical data, sections of the fetal coronary sinus were established, which were used to guide prenatal ultrasound doctor for the screening of UCS, thereby improving the accuracy and efficiency of prenatal diagnosis of UCS.