三维经食管超声心动图在二叶式主动脉瓣狭窄经导管主动脉瓣置入术中的应用研究

The application research of three-dimensional transesophageal echocardiography in transcatheter aortic valve implantation for bicuspid aortic valve stenosis patients

目的:应用三维经食管超声心动图(3D-TEE)评估二叶式主动脉瓣狭窄(BAS)患者的主动脉瓣环,探讨3D-TEE指导BAS患者行经导管主动脉瓣置入术(TAVI)的可行性。方法:分析我院成功行TAVI的BAS狭窄患者24例,对术前3D-TEE与多层螺旋CT(MSCT)测量的主动脉瓣环最大径、最小径、面积及面积衍生直径进行一致性分析,根据两者面积衍生直径预测瓣膜型号,比较两者在指导人工瓣膜型号选择上的一致性。结果:3D-TEE与MSCT在测量主动脉瓣环最大径、最小径、面积、面积衍生直径方面无统计学差异(P>0.05),ICC相关系数分别为:0.817、0.781、0.885、0.869(P<0.001);3D-TEE与MSCT预测的瓣膜型号无统计学差异(P>0.05)。结论:对于二叶式主动脉瓣重度狭窄的患者,3D-TEE可为TAVI提供瓣膜型号选择,因此,在特殊情况下可作为MSCT的替代手段,帮助临床选择合适的人工瓣膜。

Objective: Three-dimensional transesophageal echocardiography(3D-TEE) was applied to evaluate the aortic annulus in patients with bicuspid aortic valve stenosis(BAS). We explore the feasibility of using 3D-TEE to guide transcatheter aortic valve implantation. Methods: We analyzed 24 patients with bicuspid aortic valve stenosis who successfully underwent transcatheter aortic valve implantation(TAVI) in our hospital. 3D-TEE and MSCT were used to measure the maximum diameter, minimum diameter, area and area-derived diameter of the aortic valve annulus before the operation respectively, and the results were analyzed for consistency. We compared the differences between the two methods for guiding selection of the prosthetic valve size. Results: There was no significant difference between 3D-TEE and MSCT in the measurement of maximum diameter, minimum diameter, area and area-derived diameter of the aortic annulus(P>0.05). ICC correlation coefficients were 0.817, 0.781, 0.885, 0.869(P<0.001). There was no statistical difference in the valve size predicted by 3D-TEE and MSCT(P>0.05). Conclusion: 3D-TEE can provide guidance for artificial valve implantation in TAVI for patients with bicuspid aortic valve stenosis.