Interobserver and intraobserver variability of the pulsed wave tissue Doppler measurements
| Variability (%) | Coefficient of repeatability (cm/s) | |||
|---|---|---|---|---|
| Position | Inter | Intra | Inter | Intra |
| Left lateral | ||||
| S′ | 5.18 | 4.54 | 0.53 | 0.38 |
| E′ | 5.68 | 4.02 | 0.70 | 0.56 |
| A′ | 9.80 | 5.38 | 1.48 | 0.63 |
| Septum | ||||
| S′ | 5.31 | 4.47 | 0.44 | 0.47 |
| E′ | 7.07 | 7.76 | 1.06 | 1.16 |
| A′ | 8.86 | 6.31 | 0.99 | 1.05 |
| Right lateral | ||||
| S′ | 2.98 | 3.08 | 0.38 | 0.40 |
| E′ | 4.58 | 3.89 | 0.63 | 0.69 |
| A′ | 2.89 | 3.09 | 0.49 | 0.63 |
A′, peak late diastolic velocity; E′, peak early diastolic velocity; S′, peak systolic velocity.