Table 5 Interobserver variability of main exercise Doppler echocardiographic measurements of all participating centers at rest and at peak exercise
TRV (cm/s) | RVOT Act (msec) | TAPSE (mm) | RV S′ (cm/s) | RV FAC (%) | LVOT VTI (cm) | E (cm/s) | e’ (cm/s) | LV EF (%) MOD | |
|---|---|---|---|---|---|---|---|---|---|
Rest | |||||||||
Mean | 282 ± 22 | 128 ± 28 | 20.2 ± 2.2 | 12.2 ± 0.5 | 58 ± 8 | 20.5 ± 1.8 | 59.7 ± 5.3 | 12.0 ± 1.1 | 50 ± 4.6 |
Mean absolute difference | 10.6 ± 10.8 | 13 ± 14 | 1.1 ± 1.2 | 0.4 ± 0.5 | 9.5 ± 7 | 1.6 ± 1.7 | 3.5 ± 4.2 | 0.7 ± 0.9 | 3.9 ± 3 |
Mean relative difference, % | 3.8 ± 4 | 9.7 ± 9 | 5.3 ± 5.5 | 2.9 ± 3.9 | 15 ± 10 | 7.4 ± 7 | 5.7 ± 6.6 | 6.0 ± 6.9 | 7.6 ± 5.8 |
ICC | 0.97 | 0.95 | 0.97 | 0.95 | 0.82 | 0.98 | 0.99 | 0.97 | 0.97 |
95% Confidence interval | 0.92–0.99 | 0.93–0.99 | 0.92–0.99 | 0.88–0.98 | 0.75–0.91 | 0.95–0.99 | 0.97–0.99 | 0.93–0.99 | 0.93–0.99 |
Peak exercise | |||||||||
Mean | 322 ± 16 | 92 ± 16 | 24.2 ± 4.3 | 20.9 ± 1 | 59 ± 11 | 22.0 ± 2.8 | 82 ± 6.4 | 21 ± 1,6 | 57 ± 7 |
Mean absolute difference | 7.7 ± 7.4 | 11 ± 11 | 1.5 ± 3 | 0.6 ± 0.8 | 9.2 ± 7.7 | 2.2 ± 2.4 | 7.3 ± 6.4 | 1.4 ± 1.2 | 5 ± 4 |
Mean relative difference, % | 2.4 ± 2.3 | 12 ± 13 | 8 ± 14 | 2.9 ± 3.4 | 16 ± 14 | 9.6 ± 10 | 8.3 ± 7.0 | 6.5 ± 5.1 | 9 ± 7 |
ICC | 0.98 | 0.92 | 0.95 | 0.95 | 0.80 | 0.97 | 0.98 | 0.97 | 0.96 |
95% Confidence interval | 0.95–0.99 | 0.89–0.99 | 0.90–0.99 | 0.80–0.98 | 0.74–0.90 | 0.92–0.99 | 0.95–0.99 | 0.93–0.99 | 0.92–0.99 |