Table 3.
Comparison of longitudinal strain indices in different RV segments between control group and PAH children
| Variable | Control group (n = 21) | PAH children (n = 25) | p |
|---|---|---|---|
| RV-LpsS (%) | |||
| RV free wall | −24.72 ± 3.48 | −15.60 ± 3.40 | 0.0001 |
| Basal RV free wall | −28.19 ± 5.47 | −12.80 ± 4.26 | 0.0001 |
| Mid RV free wall | −26.00 ± 4.45 | −17.52 ± 5.20 | 0.0001 |
| Apical RV free wall | −20.00 ± 7.58 | −16.48 ± 4.96 | 0.077 |
| Apex | −23.66 ± 5.95 | −17.76 ± 4.47 | 0.0001 |
| IVS | |||
| Apical IVS | −27.33 ± 5.59 | −19.00 (−20.50,−16.00) | 0.0001 |
| Mid IVS | −24.38 ± 5.34 | −17.36 ± 5.70 | 0.0001 |
| Basal IVS | −17.00 ± 4.18 | NA | NA |
| RV-LpsSR(s −1 ) | |||
| RV free wall | −1.44 ± 0.09 | −1.09 ± 0.15 | 0.0001 |
| Basal RV free wall | −1.61 ± 0.19 | −1.00 ± 0.15 | 0.0001 |
| Mid RV free wall | −1.50 ± 0.17 | −1.23 ± 0.31 | 0.001 |
| Apical RV free wall | −1.21 ± 0.18 | −1.04 ± 0.16 | 0.002 |
| Apex | −1.28 ± 0.26 | −1.09 ± 0.19 | 0.009 |
| IVS | |||
| Apical IVS | −1.30 (−1.60,−1.22) | −1.21 ± 0.26 | 0.016 |
| Mid IVS | −1.45 ± 0.32 | −1.11 ± 0.30 | 0.001 |
| Basal IVS | −1.14 ± 0.24 | NA | NA |
Data are presented as means ± SD or median (25th, 75th percentiles)
c control, IVS interventricular septum, LpsS longitudinal peak systolic strain, LpsSR longitudinal peak systolic strain rate, NA no available, PAH pulmonary arterial hypertension, RV right ventricle