Intrarobserver and interobserver reproducibility of speckle tracking echocardiography data
| Intraobserver | Interobserver | |||
| Bias and limits of agreement (%) | CV (%) | Bias and limits of agreement (%) | CV (%) | |
| Global measurements | ||||
| LV GLS | 0.45±0.62 | 2.14 | 0.36±0.63 | 2.30 |
| LV peak positive early strain | 0.29±0.40 | 23.57 | 0.31±0.43 | 24.03 |
| Duration of LV ESL | 7.34±10.18 | 7.91 | 10.20±14.13 | 12.75 |
| Regional measurements of LV ESL duration | ||||
| Apical four-chamber view | 12.31±17.04 | 16.07 | 4.90±6.79 | 16.80 |
| Apical two-chamber view | 8.42±11.64 | 9.85 | 13.63±18.84 | 15.99 |
| Apical long-axis view | 8.54±11.78 | 9.98 | 16.95±23.42 | 24.71 |
CV, coefficient of variation; ESL, early systolic lengthening; GLS, global longitudinal strain; LV, left ventricular.