Study On Morphology And Function Of Mitral Valve Leaflets And Mitral Annulus In Patients With Mild Mitral Regurgitation By Real-time Three-dimensional Echocardiography

Objective: To measure the parameters of mitral valve leaflets and mitral annulus inpatients with mild mitral regurgitation （MR） by real time three-dimensionaltransesophageal echocardiography （RT-3D-TEE）, and explored the mechanism of MR.Methods: Fifty-seven MR subjects were selected and twenty-eight subjects without mitralregurgitation were served as control group, all subjects were examined by RT-3D-TEE andacquired image, Mitral valve quantification （MVQ） software was used for post-processing.To measure mitral annulus parameters: H/D_AIPm, E_2D, θ_Av-Mv, mitral annulus θ_npa, mitralvalve leaflets parameters: A_3DE, L2D_AIPm, VA1-3_tent, Vp1-3_tent, Vtent, Htent, θ_npa, at the end ofsystolic. Compared the results of two groups, and selected the most affected parameters tomild mitral regurgitation. Results: Compared with control group, VA3_tentwas decreased,mitral annulus θ_npaand L2D_AIPmincreased, and the mitral valve leaflets θ_npawasindependently correlation factor of mild mitral regurgitation. Conclusion: The mitralannulus geometry to flat in subjects with mild MR, the mitral valve local area is increasedin subjects with mild MR, the mitral valve leaflets θ_npais independently correlation factorof mild mitral regurgitation.