Résumé
Objective To validate the accuracy of real-time three-dimensional echocardiography(RT3DE) in measuring spatial geometric parameters of mitral annulus.Methods Hearts in vivo of nine healthy hybrid canines were examined by RT 3DE.Three-dimensional full-volume images of mitral annuli were acquired.The annuli were annotated and measured by TomTec 4D MV-assessment software and MATLAB.The distance between anterolateral and posteromedial commissure (commissure-commissure, CC),septolateral distance (septal-lateral, SL) and height (H) of mitral annulus were measured.Parameters correlation coefficients of CC,SL and H derived by two methods were 0.83( P＜0.01),0.78( P＜0.05)well consistent with anatomic measurements, the mean differences of CC, SL and H between two methods were 0.22 cm,0.12 cm and-0.08 cm respectively.Conclusions RT-3DE is feasible in measuring mitral annulus, which provided a convenient, accurate and reliable new method for quantitative assessing annulus geometry configuration.