Table 3.
Inter-study reproducibility of LV Torsion and Torsion rates
| LV parameter | Exam 1 | Exam 2 | Mean difference (SD) | ICC | SEM | SDC |
|---|---|---|---|---|---|---|
| Torsion °/cm |
3.4 |
3.7 |
−0.3 (0.8) |
0.73** |
0.41 |
1.1 |
| Time to peak Torsion (ms) |
293.8 |
297.9 |
−4 (33.1) |
0.77** |
15.9 |
44.0 |
| Peak systolic torsion rate ( °/s/cm) |
16.1 |
18.2 |
−1.8 (6.2) |
0.4 * |
4.8 |
13.3 |
| Peak diastolic torsion rate ( °/s/cm) | −17.2 | −15.4 | −1.8 (7.6) | 0.37* | 6.0 | 16.7 |
SD standard deviation of mean difference, p <0.05 is statistically significant, ICC Intra-class correlation coefficient, SEM standard error of measurement, SDC Smallest detectable change. ** = p value <0.0001, * = p value <0.05.