磁共振成像技术及多普勒超声在量化测定狭窄的二尖瓣面积时的比较

作     者：Lin S.J. Brown P.A. Watkins M.P. S.D. Caruthers 刘豫 

作者机构：Cardiovascular Di vision Washington Univ. School of Medicine St. Louis MO United StatesDr. 

出 版 物：《世界核心医学期刊文摘（心脏病学分册）》 (Digest of the World Core Medical Journals(Cardiology))

年 卷 期：2005年第1卷第1期

页      面：45-46页

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 08[工学] 1010[医学-医学技术（可授医学、理学学位）] 10[医学] 

主　　题：磁共振成像技术 二尖瓣面积 血流速度 可重复性 多普勒超声法 二尖瓣血流 通过速度 峰流速 常用技术 数据分析 

摘      要：Objectives The purpose of this study was to evaluate the reliability of the pr essure half-time(PHT) method for estimating mitral valve areas(MVAs) by velocit y-encoded cardiovascular magnetic resonance(VE-CMR) and to compare the method with paired Doppler ultrasound. Background The pressure halftime Doppler echocar diography method is a practical technique for clinical evaluation of mitral sten osis. As CMR continues evolving as a routine clinical tool, its use for estimati ng MVA requires thorough evaluation. Methods Seventeen patients with mitral sten osis underwent echocardiography and CMR. Using VE-CMR, MVA was estimated by PHT method. Additionally, peak E and peak A velocities were defined. Interobserver repeatability of VE-CMR was evaluated. Results By Doppler, MVAs ranged from 0.8 7 to 4.49 cm2; by CMR, 0.91 to 2.70 cm2, correlating well between modalities (r= 0.86). The correlation coefficient for peak E and peak A between modalities was 0.81 and 0.89, respectively. Velocity-encoded CMR data analysis provided robust , repeatable estimates of peak E, peak A, and MVA (r=0.99, 0.99, and 0.96, respe ctively). Conclusions Velocity-encoded cardiovascular magnetic resonance can be used routinely as a robust tool to quantify MVA via mitral flow velocity analys is with PHT method.