Table 5.
Intra- and interobserver reproducibility of the LA parameters derived from feature tracking
| Intraobserver reproducibility | Interobserver reproducibility | |||
|---|---|---|---|---|
| ICC | 95% CI | ICC | 95% CI | |
| LAVmax (ml) | 0.99 | 0.97–1.00 | 0.98 | 0.94–0.99 |
| LAVpac (ml) | 0.99 | 0.97–1.00 | 0.99 | 0.98–1.00 |
| LAVmin (ml) | 0.99 | 0.99–1.00 | 0.99 | 0.98–1.00 |
| LA total EF (%) | 0.98 | 0.96–0.99 | 0.98 | 0.95–0.99 |
| LA passive EF (%) | 0.90 | 0.77–0.96 | 0.93 | 0.83–0.97 |
| LA booster EF (%) | 0.98 | 0.95–0.99 | 0.98 | 0.94–0.99 |
| εs (%) | 0.99 | 0.92–1.00 | 0.95 | 0.68–0.99 |
| εe (%) | 0.97 | 0.84–0.99 | 0.97 | 0.91–0.99 |
| εa (%) | 0.98 | 0.94–0.99 | 0.92 | 0.54–0.98 |
| SRs (1/s) | 0.90 | 0.74–0.96 | 0.88 | 0.73–0.95 |
| SRe (1/s) | 0.97 | 0.91–0.99 | 0.99 | 0.97–0.99 |
| SRa (1/s) | 0.97 | 0.91–0.99 | 0.95 | 0.85–0.98 |
EF emptying fraction, LA left atrial, LAV LA volume; SR strain rate