Table 2.
Intra-observer variability of right and left ventricular parameters.
| Observer 1 | Observer 2 | Observer 3 | ||||
|---|---|---|---|---|---|---|
| RV | LV | RV | LV | RV | LV | |
| EF (%) | ||||||
| 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 |
| EDV index (mL/m2) | ||||||
| Mean | 74.7 ± 19.2 | 95.0 ± 33.3 | 74.9 ± 19.8 | 95.2 ± 32.3 | 75.3 ± 21.8 | 93.2 ± 32.4 |
| Mean difference | 4.1 ± 7.0 | 1.2 ± 3.4 | − 2.4 ± 9.5 | 1.3 ± 5.9 | 0.7 ± 9.9 | 1.3 ± 6.3 |
| CV | 9.3 | 3.6 | 12.7 | 6.2 | 13.1 | 6.8 |
| ICC | 0.917 | 0.994 | 0.886 | 0.983 | 0.904 | 0.981 |
| ESV index (mL/m2) | ||||||
| Mean | 35.9 ± 16.5 | 46.2 ± 31.8 | 34.2 ± 16.2 | 48.7 ± 32.5 | 36.9 ± 17.0 | 45.5 ± 31.2 |
| Mean difference | 2.7 ± 4.3 | 1.3 ± 3.5 | − 0.6 ± 4.9 | 0.4 ± 4.4 | − 0.7 ± 6.1 | 0.7 ± 4.5 |
| CV | 12.0 | 7.6 | 14.4 | 9.1 | 16.7 | 10.0 |
| ICC | 0.955 | 0.993 | 0.955 | 0.991 | 0.937 | 0.989 |
| Stroke V index (mL/m2) | ||||||
| Mean | 38.8 ± 10.5 | 48.7 ± 12.4 | 40.9 ± 11.6 | 46.6 ± 12.1 | 38.6 ± 10.9 | 47.5 ± 13.1 |
| Mean difference | 1.4 ± 5.0 | − 0.1 ± 4.0 | −1.5 ± 8.1 | 0.8 ± 7.5 | 1.2 ± 11.5 | 0.4 ± 6.9 |
| CV | 12.8 | 8.3 | 19.9 | 16.2 | 29.7 | 14.4 |
| ICC | 0.890 | 0.949 | 0.777 | 0.824 | 0.567 | 0.874 |
| Mass index (g/m2) | ||||||
| Mean | 27.2 ± 5.8 | 75.9 ± 19.3 | 23.4 ± 5.4 | 69.1 ± 17.2 | 30.0 ± 7.2 | 74.2 ± 18.4 |
| Mean difference | 2.5 ± 3.1 | 1.7 ± 3.2 | 1.6 ± 4.5 | − 0.1 ± 6.4 | −0.2 ± 5.1 | − 0.1 ± 5.0 |
| CV | 11.3 | 4.2 | 19.2 | 9.2 | 17.1 | 6.7 |
| ICC | 0.785 | 0.983 | 0.672 | 0.935 | 0.779 | 0.965 |
Note. RV = right ventricle; LV = left ventricle; EF = ejection fraction; EDV = end diastolic volume; ESV = end systolic volume; Stroke V = Stroke Volume; CV = coefficient of variation, expressed as a percentage; ICC = intraclass correlation coefficient.