Table 4.
Observer 1 | Observer 2 | Observer 3 | ||||
---|---|---|---|---|---|---|
RV | LV | RV | LV | RV | LV | |
All measurements | ||||||
N (%) | 60 (100) | 60 (100) | 60 (100) | 60 (100) | 60 (100) | 60 (100) |
Mean (%) | 53.2 ± 11.4 | 55.3 ± 15.2 | 55.5 ± 11.5 | 52.9 ± 15.7 | 52.0 ± 10.6 | 54.8 ± 15.9 |
Mean difference (%) | − 1.3 ± 4.1 | − 0.7 ± 3.0 | − 0.7 ± 6.5 | 0.5 ± 4.9 | 1.4 ± 10.5 | − 0.5 ± 5.9 |
CV (%) | 7.8 | 5.4 | 11.7 | 9.4 | 20.2 | 10.7 |
ICC | 0.931 | 0.980 | 0.854 | 0.952 | 0.605 | 0.935 |
Same basal slice selected | ||||||
N (%) | 44 (73) | 44 (73) | 34 (57) | 37 (62) | 38 (63) | 39 (65) |
Mean (%) | 52.5 ± 12.3 | 56.0 ± 15.4 | 55.1 ± 13.7 | 55.9 ± 15.3 | 50.9 | 55.7 ± 16.0 |
Mean difference (%) | −0.8 ± 3.3 | − 0.2 ± 2.1 | 0.3 ± 3.6 | 0.6 ± 3.3 | 0.7 ± 6.7 | 0.9 ± 4.1 |
CV (%) | 6.4 | 3.7 | 6.6 | 6.0 | 13.1 | 7.3 |
ICC | 0.962 | 0.991 | 0.966 | 0.976 | 0.807 | 0.967 |
Same apical slice selected | ||||||
N (%) | 44 (73) | 48 (80) | 41 (68) | 44 (73) | 28 (47) | 40 (67) |
Mean (%) | 54.6 ± 10.7 | 55.3 ± 15.1 | 54.6 ± 11.2 | 50.2 ± 17.0 | 52.1 ± 10.5 | 54.2 ± 17.0 |
Mean difference (%) | −1.3 ± 4.2 | − 0.5 ± 2.7 | 0.3 ± 5.6 | 0.2 ± 4.8 | 1.2 ± 8.5 | −0.5 ± 5.9 |
CV (%) | 7.6 | 4.9 | 10.3 | 9.6 | 16.3 | 10.8 |
ICC | 0.922 | 0.984 | 0.884 | 0.962 | 0.720 | 0.943 |
Same systolic phase selected | ||||||
N (%) | 48 (80) | 48 (80) | 36 (60) | 36 (60) | 21 (35) | 21 (35) |
Mean (%) | 54.5 ± 10.4 | 55.7 ± 15.7 | 58.4 ± 9.6 | 55.2 ± 13.2 | 53.7 ± 9.0 | 55.9 ± 17.4 |
Mean difference (%) | −1.4 ± 4.1 | − 0.6 ± 3.2 | −0.2 ± 6.1 | 0.3 ± 5.5 | 1.6 ± 7.8 | 1.0 ± 3.9 |
CV (%) | 7.5 | 5.7 | 10.4 | 9.9 | 14.5 | 7.1 |
ICC | 0.919 | 0.979 | 0.823 | 0.920 | 0.686 | 0.974 |
Same basal/apical slices and ES phase selected | ||||||
N (%) | 25 (42) | 27 (45) | 15 (25) | 16 (27) | 5 (8) | 9 (15) |
Mean (%) | 54.9 ± 11.6 | 58.3 ± 14.6 | 57.2 ± 11.5 | 55.2 ± 12.3 | 53.8 ± 3.5 | 50.7 ± 18.9 |
Mean difference (%) | − 0.7 ± 2.9 | 0.1 ± 1.8 | 0.1 ± 3.8 | 0.6 ± 3.4 | −2.9 ± 4.5 | 2.4 ± 3.1 |
CV (%) | 5.4 | 3.1 | 6.6 | 6.1 | 8.5 | 6.1 |
ICC | 0.968 | 0.993 | 0.951 | 0.964 | 0.355 | 0.980 |
Note. RV = right ventricle; LV = left ventricle; EF = ejection fraction; CV = coefficient of variation, expressed as a percentage; ICC = intraclass correlation coefficient; ES = end systole.