Table 6.
Inter- and Intra-observer variability for 3D Mitral Valve Measurements
| Parameter | Intraobserver (n = 16) | Interobserver (n = 16) | ||
|---|---|---|---|---|
| Mean % Error ± SD | ICC | Mean % Error ± SD | ICC | |
| AP-Diameter (cm) | 6.30 ± 5.29 | 0.95 (0.87, 0.98) | 5.65 ± 5.39 | 0.94 (0.85, 0.98) |
| AL-PM Diameter (cm) | 3.30 ± 3.91 | 0.97 (0.92, 0.99) | 4.69 ± 3.86 | 0.96 (0.90, 0.99) |
| Non-planar angle (deg) | 2.16 ± 1.57 | 0.93 (0.82, 0.97) | 5.63 ± 4.87 | 0.58 (0.16, 0.82) |
| Annulus circumference, 3D (cm) | 3.85 ± 3.71 | 0.97 (0.92, 0.99) | 4.52 ± 4.22 | 0.95 (0.87, 0.98) |
| Annular area, 3D (cm2) | 7.71 ± 7.63 | 0.97 (0.92, 0.99) | 9.12 ± 8.52 | 0.95 (0.87, 0.98) |
| Annular height (cm) | 10.17 ± 7.69 | 0.89 (0.73, 0.96) | 9.21 ± 8.55 | 0.74 (0.42, 0.90) |
| Tenting volume (cc) | 15.03 ± 14.36 | 0.95 (0.87, 0.98) | 16.22 ± 15.46 | 0.94 (0.85, 0.98) |
| Tenting area (cm2) | 18.15 ± 17.63 | 0.95 (0.87, 0.98) | 25.70 ± 35.14 | 0.80 (0.54, 0.92) |
| Tenting height (mm) | 11.54 ± 8.96 | 0.93 (0.82, 0.97) | 27.02 ± 38.09 | 0.56 (0.13, 0.81) |
| Commissural diameter | 3.55 ± 4.26 | 0.97 (0.92, 0.99) | 35.88 ± 31.99 | 0.96 (0.90, 0.99) |
| Anterior leaflet area | 8.05 ± 8.38 | 0.96 (0.90, 0.99) | 5.00 ± 4.18 | 0.94 (0.85, 0.98) |
| Posterior leaflet area (cm2) | 5.01 ± 4.09 | 0.99 (0.97, 1.00) | 9.82 ± 9.26 | 0.83 (0.60, 0.93) |
| Anterior leaflet length (cm) | 6.98 ± 5.99 | 0.88 (0.71, 0.95) | 18.11 ± 11.50 | 0.80 (0.54, 0.92) |
| Posterior leaflet length (cm) | 4.29 ± 4.63 | 0.96 (0.90, 0.99) | 8.90 ± 7.56 | 0.58 (0.16, 0.82) |
| Billow volume (cc) | 48.58 ± 36.92 | 0.96 (0.90, 0.99) | 79.21 ± 52.02 | 0.95 (0.87, 0.98) |
AP = anteroposterior; AL-PM = anterolateral-posteromedial.