Table V.
Intra- and inter-observer variability for conventional and speckle tracking echocardiography.
| Inter-observer | Intra-observer | |||
|---|---|---|---|---|
| Parameter | % Error | CC | % Error | CC |
| Conventional measures | ||||
| LVEDD (mm) | 0.7±1.3 | 0.84 | 0.5±0.2 | 0.86 |
| LVESD (mm) | 3.3±2.6 | 0.98 | 2.4±1.7 | 0.99 |
| LVPWTd (mm) | 9.6±2.5 | 0.89 | 4.3±1.8 | 0.94 |
| LVPWTs (mm) | 3.8±2.6 | 0.95 | 4.5±1.4 | 0.92 |
| LVAWTd (mm) | 4.9±1.1 | 0.89 | 3.7±1.3 | 0.9 |
| LVAWTs (mm) | 2.6±3.1 | 0.97 | 1.7±3.5 | 0.98 |
| LVEDV (µl) | 1.6±3.0 | 0.92 | 1.4±3.2 | 0.91 |
| LVESV (µl) | 4.6±0.9 | 0.80 | 3.5±0.7 | 0.82 |
| EF (%) | 6.2±1.5 | 0.82 | 4.9±0.5 | 0.87 |
| FS (%) | 5.7±1.2 | 0.87 | 7.8±0.6 | 0.89 |
| LV mass (mg) | 8.2±4.6 | 0.83 | 5.6±1.7 | 0.87 |
| Corrected LV mass (mg) | 8.2±4.6 | 0.83 | 4.4±6.2 | 0.91 |
| SV (µl) | 0.7±1.8 | 0.82 | 0.9±1.4 | 0.85 |
| Strain measures | ||||
| Short axis | ||||
| CS (%) | 1.8±1.2 | 0.97 | 1.4±0.3 | 0.98 |
| CSR (s−1) | 4.2±4.1 | 0.94 | 5.9±4.5 | 0.92 |
| Long axis | ||||
| LS (%) | 1.9±1.6 | 0.92 | 1.8±2.1 | 0.90 |
| LSR (s−1) | 3.8±3.0 | 0.93 | 4.5±4.0 | 0.96 |
| RS (%) | 2.5±1.6 | 0.90 | 3.8±1.9 | 0.91 |
| RSR (s−1) | 3.2±2.6 | 0.97 | 2.3±1.9 | 0.99 |
Values are presented as the mean ± standard error. LVEDD, left ventricular end-diastolic diameter; LVESD, left ventricular end-systolic diameter; LVPWTd, left ventricular posterior wall thickness in diastole; LVPWTs, left ventricular posterior wall thickness in systole; LVAWTd, left ventricular anterior wall thickness in diastole; LVAWTs, left ventricular anterior wall thickness in systole; LVESV, left ventricular end-systolic volume; LVEDV, left ventricular end-diastolic volume; EF, ejection fraction; FS, fraction shortening; SV, stroke volume; CS, circumferential strain; LS, longitudinal strain; RS, radial strain; LSR, longitudinal strain rate; CSR, circumferential strain rate; RSR, radial strain rate.