Table 2 Mean values of circumferential strain, radial strain and LV twist from 12 healthy volunteers and the sample size required to detect a 10% change in each absolute value.
| Â | Â | Endocardium | Midline | Epicardium | |||
|---|---|---|---|---|---|---|---|
| Â | Â | Mean | Sample Size | Mean | Sample Size | Mean | Sample Size |
Circumferential strain | Apex | -0.38 | 20 | -0.29 | 9 | -0.21 | 10 |
| Â | Mid LV | -0.33 | 15 | -0.24 | 8 | -0.19 | 11 |
| Â | Base | -0.29 | 14 | -0.23 | 16 | -0.18 | 14 |
Radial Strain | Apex | Â | Â | 0.22 | 153 | Â | Â |
| Â | Mid LV | Â | Â | 0.21 | 172 | Â | Â |
| Â | Base | Â | Â | 0.21 | 436 | Â | Â |
LV twist (degrees) | Â | 12.25 | 72 | 10.44 | 66 | 8.60 | 112 |