Table 2.
Inter-study reproducibility
| Left atrium | Right atrium | ||||||
|---|---|---|---|---|---|---|---|
| Mean difference ± 2 SD | CoV (%) | ICC (95 % CI) | Mean difference ± 2 SD | CoV (%) | ICC (95 % CI) | ||
| Atrial function | Volumetric index (%) | ||||||
| Reservoir; global | EF Total | 1.5 ± 5.8 | 4.5 | 0.94 (0.81-0.98) | 0.5 ± 8.0 | 7.5 | 0.96 (0.87-0.98) |
| Conduit | EF Passive | 0.6 ± 11.3 | 12.6 | 0.84 (0.54-0.94) | 1.9 ± 9.0 | 13.9 | 0.91 (0.75-0.97) |
| Booster pump | EF Booster | 0.8 ± 8.5 | 21.6 | 0.71 (0.19-0.90) | 1.4 ± 8.2 | 19.4 | 0.73 (0.26-0.90) |
| Strain (%) | |||||||
| Reservoir | εs | 0.3 ± 3.5 | 5.7 | 0.97 (0.92-0.99) | 0.5 ± 11.1 | 16.6 | 0.89 (0.68-0.96) |
| Conduit | εe | 0.5 ± 3.9 | 8.2 | 0.97 (0.90-0.99) | 0.6 ± 9.1 | 20.7 | 0.84 (0.53-0.94) |
| Booster pump | εa | 0.2 ± 2.7 | 18.3 | 0.95 (0.85-0.98) | 0.1 ± 5.6 | 24.3 | 0.89 (0.68-0.96) |
| Strain Rate (s −1 ) | |||||||
| Reservoir | SRs | 0.0 ± 0.2 | 8.2 | 0.96 (0.87-0.99) | 0.0 ± 0.6 | 24.0 | 0.76 (0.29-0.92) |
| Conduit | SRe | 0.2 ± 0.5 | 18.5 | 0.78 (0.36-0.93) | 0.1 ± 0.6 | 35.9 | 0.67 (0.05-0.89) |
| Booster pump | SRa | 0.0 ± 0.4 | 22.7 | 0.91 (0.75-0.97) | 0.1 ± 0.7 | 32.2 | 0.90 (0.73-0.97) |
| Atrial volume (ml) | |||||||
| Maximum | 1.0 ± 8.8 | 6.8 | 0.98 (0.94-0.99) | 0.9 ± 19.5 | 12.4 | 0.96 (0.88-0.99) | |
| Minimum | 1.2 ± 4.6 | 10.0 | 0.98 (0.92-0.99) | 0.8 ± 10.1 | 13.7 | 0.97 (0.93-0.99) | |
| Prior to atrial contraction | 0.8 ± 7.3 | 10.3 | 0.97 (0.92-0.99) | 1.9 ± 14.2 | 13.2 | 0.97 (0.91-0.99) | |
Inter-study reproducibility for left and right atrial functional parameters and volumes as determined by Bland-Altman analysis (mean difference ± 2SD), coefficients of variation (CoV) and intra-class correlation coefficients (ICC).
SD, standard deviation; CoV, coefficient of variation; ICC, intraclass correlation coefficient; CI, confidence interval.