Table 2.
Echocardiographic measurements obtained at the reading center, repeated in different moments by different readers
| Measurement | Values | Reproducibility measurement | |||
|---|---|---|---|---|---|
| n | First reading at the reading center | Second reading at the reading center | Mean difference (95% CI) | ICC (95% CI) | |
| Measurement | |||||
| Aortic root diameter (cm) | 63 | 3.02 ± 0.37 | 3.02 ± 0.37 | 0.00 (−0.07-0.07) | 0.74 (0.61-0.84) |
| LA diameter (cm) | 66 | 3.58 ± 0.43 | 3.63 ± 0.43 | −0.05 (-0.11-0.01) | 0.84 (0.75-0.90) |
| Septal thickness(cm) | 66 | 0.87 ± 0.19 | 0.94 ± 0.18 | -0.07 (−0.09-0.04) | 0.84 (0.75-0.90) |
| LV posterior wall thickness (cm) | 66 | 0.87 ± 0.17 | 0.93 ± 0.15 | −0.06 (−0.10-0.02) | 0.53 (0.33-0.68) |
| Diastolic LV diameter (cm) | 66 | 4.60 ± 0.47 | 4.55 ± 0.50 | 0.05 (−0.01-0.11) | 0.88 (0.82-0.93) |
| Systolic LV diameter (cm) | 66 | 2.85 ± 0.50 | 2.90 ± 0.52 | −0.05 (−0.10-0.00) | 0.92 (0.86-0.95) |
| LV mass | 66 | 134.80 ± 46.22 | 145.30 ± 43.66 | −10.50 (−16.40-4.60) | 0.86 (0.78-0.91) |
| LA area (cm²) | 59 | 16.80 ± 4.03 | 18.07 ± 3.19 | −1.27 (−1.94-0.60) | 0.75 (0.61-0.84) |
| LV ejection fraction | 66 | 68.04 ± 8.97 | 65.79 ± 9.44 | 2.25 (0.76-3.75) | 0.78 (0.67-0.86) |
| M-mode | |||||
| Aortic root diameter (cm) | 57 | 3.00 ± 0.40 | 2.98 ± 0.40 | 0.02 (−0.03-0.07) | 0.88 (0.80-0.93) |
| LA diameter (cm) | 57 | 3.73 ± 0.47 | 3.77 ± 0.47 | −0.04 (−0.10-0.01) | 0.89 (0.83-0.94) |
| Septal thickness(cm) | 35 | 0.86 ± 0.14 | 1.04 ± 0.18 | −0.18 (−0.24-0.13) | 0.54 (0.26-0.74) |
| LV posterior wall thickness (cm) | 35 | 0.83 ± 0.16 | 1.01 ± 0.19 | −0.18 (−0.22-0.13) | 0.74 (0.55-0.70) |
| Diastolic LV diameter (cm) | 35 | 4.90 ± 0.60 | 4.79 ± 0.63 | 0.11 (0.03-0.18) | 0.93 (0.87-0.97) |
| Systolic LV diameter (cm) | 35 | 2.99 ± 0.77 | 3.12 ± 0.65 | −0.13 (−0.22-0.04) | 0.88 (0.88-0.97) |
| LV mass | 35 | 143.42 ± 41.58 | 178.04 ± 47.58 | −34.61 (-42.89-26.34) | 0.86 (0.73-0.92) |
| LV ejection fraction | 35 | 68.81 ± 11.93 | 63.92 ± 9.26 | 4.89 (2.20-7.58) | 0.73 (0.53-0.86) |
| Mitral Doppler | |||||
| E wave | 66 | 0.72 ± 0.15 | 0.72 ± 0.16 | 0.00 (−0.02-0.02) | 0.91 (0.86-0.94) |
| Deceleration time | 66 | 222.59 ± 44.18 | 214.03 ± 35.73 | 8.56 (0.42-16.69) | 0.66 (0.50-0.78) |
| A wave | 66 | 0.58 ± 0.15 | 0.58 ± 0.15 | 0.01 (−0.01-0.02) | 0.92 (0.87-0.95) |
| E/A ration | 66 | 1.31 ± 0.41 | 1.32 ± 0.42 | −0.02 (−0.03-0.00) | 0.99 (0.98-0.99) |
| Medial mitral annular TDI | |||||
| s' velocity | 64 | 7.69 ± 1.13 | 7.74 ± 1.18 | −0.06 (−0.31-0.19) | 0.62 (0.45-0.75) |
| e' velocity | 64 | 10.09 ± 2.49 | 9.70 ± 2.54 | 0.39 (0.03-0.76) | 0.83 (0.74-0.89) |
| a' velocity | 64 | 9.49 ± 1.61 | 9.33 ± 1.55 | 0.16 (0.00-0.31) | 0.92 (0.88-0.95) |
| Lateral mitral annular TDI | |||||
| s' velocity | 64 | 8.50 ± 1.74 | 9.11 ± 1.83 | −0.61 (−1.01-0.20) | 0.59 (0.40-0.73) |
| e' velocity | 64 | 12.41 ± 2.36 | 12.36 ± 2.36 | 0.05 (−0.16-0.27) | 0.93 (0.89-0.96) |
| a' velocity | 63 | 9.42 ± 2.37 | 9.22 ± 2.18 | 0.20 (0.00-0.40) | 0.94 (0.90-0.96) |
ICC: intraclass correlation coefficient; difference: value obtained at the reading center − value obtained at the acquisition center; LV: left ventricle; LA: left atrium; TDI: tissue Doppler imaging. The values obtained at the acquisition and reading centers are expressed as the mean ± standard deviation.