Table 3 Magnitudes and rates (mean ± standard deviation) of myocardial twist and torsion
| Â | Obs. 2, Day 1 | Obs. 1, Day 1 | Obs. 1, Day 2 | Inter-test CoV (%) | Inter-Obs CoV (%) | |
|---|---|---|---|---|---|---|
End systolic twist (°) | Basal | −1.9 ± 1.3 | −2.2 ± 1.4 | −2.7 ± 1.1 | 34 | 13 |
Mid | 0.5 ± 1.7 | 0.5 ± 1.8 | −0.1 ± 1 | 547 | 24 | |
Apical | 4.6 ± 2.6 | 4.5 ± 2.4 | 3.7 ± 1.3 | 34 | 6 | |
Peak systolic twist rate (°/ms) | Basal | −90 ± 30 | −100 ± 30 | −130 ± 30 | 26 | 8 |
Mid | 120 ± 70 | 120 ± 70 | 130 ± 50 | 32 | 6 | |
Apical | 180 ± 160 | 170 ± 60 | 190 ± 40 | 20 | 4 | |
Peak diastolic twist rate (°/ms) | Basal | 50 ± 50 | 60 ± 50 | 70 ± 80 | 82 | 17 |
Mid | −100 ± 40 | −100 ± 40 | −70 ± 40 | 35 | 7 | |
Apical | −160 ± 40 | −150 ± 40 | −160 ± 50 | 30 | 5 | |
Peak torsion (°/cm) |  | 7.7 ± 2.0 | 7.9 ± 1.8 | 7.7 ± 1.1 | 12 | 5 |
Peak systolic torsion rate (°/cm/ms) |  | 240 ± 40 | 250 ± 40 | 270 ± 80 | 22 | 6 |
Peak diastolic torsion rate (°/cm/ms) |  | −200 ± 70 | −210 ± 90 | −230 ± 80 | 25 | 10 |