Table 3.
Inter-study reproducibility for CMR-FT derived LA dynamics in 2- and 4-chamber views
| Left atrium (2-chamber view) | Left atrium (4-chamber view) | ||||||
|---|---|---|---|---|---|---|---|
| Mean difference ± 2 SD | CoV (%) | ICC (95 % CI) | Mean difference ± 2 SD | CoV (%) | ICC (95 % CI) | ||
| Atrial function | Strain (%) | ||||||
| Reservoir | εs | 0.7 ± 7.1 | 9.2 | 0.96 (0.89-0.99) | 0.3 ± 8.2 | 17.4 | 0.84 (0.55-0.95) |
| Conduit | εe | 0.2 ± 6.3 | 10.9 | 0.97 (0.92-0.99) | 0.3 ± 7.9 | 21.7 | 0.82 (0.48-0.94) |
| Booster pump | εa | 0.5 ± 2.2 | 22.2 | 0.92 (0.76-0.97) | 0.0 ± 3.3 | 31.4 | 0.93 (0.80-0.98) |
| Strain Rate (s −1 ) | |||||||
| Reservoir | SRs | 0.0 ± 0.3 | 9.9 | 0.96 (0.90-0.99) | 0.0 ± 0.4 | 21.1 | 0.89 (0.67-0.96) |
| Conduit | SRe | 0.0 ± 0.5 | 16.6 | 0.93 (0.80-0.98) | 0.3 ± 0.9 | 32.6 | 0.45 (0.00-0.80) |
| Booster pump | SRa | 0.1 ± 0.1 | 24.4 | 0.91 (0.73-0.97) | 0.0 ± 0.5 | 37.4 | 0.76 (0.28-0.92) |
Inter-study reproducibility for left atrial strain and strain rate parameters in 2- and 4-chamber views 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.