Deformation pattern and predictive value of right ventricular longitudinal strain in children with pulmonary arterial hypertension

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

ISSN: 1476-7120