Table 2 MA measures at 2D TTE and 3D TEE in the whole cohort

2D TTE MA measures

 A4c diameter (mm)

42 (39–45)

 A3c diameter (mm)

35 (33–38)

 A2c diameter (mm)

40 ± 5

 PLAX diameter (mm)

35 (33–39)

 Method 1, MA area (mm²) (circular assumption, A4c)

1,382 (1,182–1,581)

 Method 2, MA area (mm²) (elliptical assumption, A2c-A4c)

1,275 (1,118–1,493)

 Method 3, MA area (mm²) (elliptical assumption, A2c-PLAX)

1,082 (951–1,241)

3D TEE MA measures

 AP diameter (mm)

37 ± 5

 ALPM diameter (mm)

44 (41–48)

 AP/ALPM diameters ratio

0.83 ± 0.09

 MA area, direct measurement by semi-automated method (mm²)

1,386 (1,293–1,673)