Table 3.
Left ventricular GLS SR intra- and inter-observer reproducibility
| Resolution | Intra-observer | Inter-Observer | |||||
|---|---|---|---|---|---|---|---|
| Spatial (mm) | Temporal (frames/cycle) | Mean difference (SD of the Diff.) | ICC (95% CI) | CoV (%) | Mean difference (SD of the Diff.) | ICC (95% CI) | CoV (%) |
| 5 | 20 | 0.01 (0.15) | 0.95 (0.94–0.96) | 17.6 | 0.01 (0.23) | 0.88 (0.84–0.90) | 26.7 |
| 5 | 30 | 0.00 (0.18) | 0.96 (0.95–0.97) | 15.8 | 0.02 (0.28) | 0.88 (0.85–0.91) | 24.9 |
| 5 | 40 | 0.02 (0,22) | 0.94 (0.93–0.96) | 16.9 | 0.00 (0.32) | 0.86 (0.83–0.89) | 25.4 |
| 5 | 50 | 0.06 (0.30) | 0.91 (0.89–0.93) | 20.2 | 0.01 (0.33) | 0.89 (0.86–0.91) | 22.5 |
| 8 | 20 | 0.03 (0.15) | 0.96 (0.95–0.97) | 16.0 | 0.03 (0.22) | 0.89 (0.86–0.92) | 25.0 |
| 8 | 30 | 0.00 (0.19) | 0.95 (0.94–0.96) | 16.3 | 0.03 (0.28) | 0.87 (0.84–0.90) | 25.4 |
| 8 | 40 | 0.02 (0.20) | 0.95 (0.93–0.96) | 16.4 | 0.00 (0.29) | 0.88 (0.84–0.90) | 24.2 |
| 8 | 50 | 0.03 (0.30) | 0.92 (0.90–0.94) | 19.6 | 0.02 (0.49) | 0.77 (0.70–0.82) | 32.9 |
| 10 | 20 | 0.02 (0.15) | 0.96 (0.95–0.97) | 17.0 | 0.02 (0.26) | 0.87 (0.83–0.90) | 29.2 |
| 10 | 30 | 0.03 (0.21) | 0.96 (0.94–0.97) | 17.3 | 0.01 (0.32) | 0.89 (0.85–0.91) | 27.1 |
| 10 | 40 | 0.02 (0.21) | 0.96 (0.95–0.97) | 16.0 | 0.01 (0.35) | 0.87 (0.84–0.90) | 27.0 |
| 10 | 50 | 0.05 (0.33) | 0.94 (0.92–0.95) | 21.6 | 0.02 (0.38) | 0.88 (0.85–0.91) | 25.7 |
SD standard deviation, Diff difference, ICC intraclass correlation coefficient, CoV coefficient of variation, LV left ventricular, SRs systolic strain rate (n = 252 data points)