Fig. 2

Comparison between 3D TEE semi-automatic MA area and MA area derived from 2D TTE MA diameters. Linear regression analysis between 3D TEE_sa MA area and 2D TTE area by method 1 (A), linear regression analysis between 3D TEE_sa MA area and 2D TTE area by method 2 (B), linear regression analysis between 3D TEE_sa MA area and 2D TTE area by method 3 (C), Bland-Altman analysis of 3D TEE_sa MA area and 2D TTE MA area by method 1 (D), Bland-Altman analysis of 3D TEE_sa MA area and 2D TTE MA area by method 2 (E), Bland-Altman analysis of 3D TEE_sa MA area and 2D TTE MA area by method 3 (F). Method 1: assumption of a circular shape for the MA. Measure of MA diameter in apical 4 chamber (d). MA area = 3.14 (d/2)². Method 2: assumption of an elliptical shape for the MA. Measure of MA diameters in apical 2 (d1) and 4 chambers (d2). MA area = 3.14 (d1*d2)/4. Method 3: assumption of an elliptical shape for the MA. Measure of MA diameters in PLAX (d1) and apical 2 chambers (d2). MA area = 3.14 (d1*d2)/4. MA: mitral annulus, SD: standard deviations, 3D TEE: 3-dimensional transesophageal echocardiography, 3D TEE_sa: 3-dimensional transesophageal echocardiography semi-automated method, 2D TTE: 2-dimensional transthoracic echocardiography