Table 2 Left ventricular (LV) rotation and torsion characteristics of subgroups according to percentage predicted exercise capacity
From: Left ventricular torsional dynamics post exercise for LV diastolic function assessment
Tertiles | 1 (n = 28) | 2 (n = 30) | 3 (n = 30) | ANOVA |
|---|---|---|---|---|
Predicted exercise capacity | Predicted exercise capacity | Predicted exercise capacity | ||
≤100% | 101-125% | ≥126% | ||
LV Torsion at Rest (°/cm) | 1.2 ± 0.6 | 1.2 ± 0.5 | 1.3 ± 0.5 | NS |
LV Torsion post exercise (°/cm) | 1.0 ± 0.5 | 1.4 ± 0.6 | 1.5 ± 0.6 | p=0.006 |
LV Torsion change (Δ) | -0.13 ± 0.7 | 0.16 ± 0.6 | 0.17 ± 0.6 | NS |
LV apex rotation at Rest (°) | 3.9 ± 3.0 | 3.2 ± 1.8 | 3.8 ± 3.1 | NS |
LV apex rotation post exercise (°) | 3.5 ± 2.7 | 5.1 ± 3.1 | 5.8 ± 4.2 | p=0.04 |
LV apex rotation change (Δ) | -0.4 ± 4.0 | 1.6 ± 3.4 | 1.8 ± 3.4 | p=0.04 |
LV apex rotation velocity at Rest (°/s) | 48 ± 28 | 38 ± 22 | 52 ± 30 | NS |
LV apex rotation velocity post exercise (°/s) | 53 ± 32 | 75 ± 37 | 69 ± 39 | NS |
LV apex rotation velocity change (Δ) | 5 ± 39 | 35 ± 44 | 15 ± 48 | NS |
LV base rotation at Rest (°) | 5.0 ± 2.4 | 5.3 ± 3.3 | 6.3 ± 2.9 | NS |
LV base rotation post exercise (°) | 4.5 ± 2.7 | 4.9 ± 2.7 | 5.9 ± 3 | NS |
LV base rotation change (Δ) | -0.6 ± 3.3 | -0.5 ± 3.7 | -0.5 ± 4.3 | NS |
LV base rotation velocity at Rest (°/s) | 69 ± 36 | 42 ± 28 | 55 ± 28 | NS |
LV base rotation velocity post exercise (°/s) | 61 ± 30 | 65 ± 30 | 71 ± 34 | NS |
LV base rotation velocity change (Δ) | -8.3 ± 40 | 25 ± 33 | 14 ± 47 | NS |