Feasibility, reproducibility and diagnostic usefulness of right ventricular strain by 2-dimensional speckle-tracking echocardiography in ARDS patients: the ARD strain study

Annals of Intensive Care

Table 3 Diagnostic value of STE-derived parameters in discriminating RV dysfunction diagnosed by conventional parameters

STE-derived parameters of RV function	TAPSE (cut-off 12 mm)			S’ (cut-off 11.5 cm/s)			RV FAC (cut-off 35%)			ED RV: LV > 0.6 and at least 1 abnormal conventional parameter
STE-derived parameters of RV function	AUROC	95% CI	p	AUROC	95% CI	p	AUROC	95% CI	p	AUROC	95% CI	p
RV inferior LSS	0.893	0.783–1.00	0.002	0.75	0.603–0.897	0.003	0.776	0.609–0.944	0.003	0.814	0.675–0.953	0.001
RV lateral LSS	0.849	0.724–0.974	0.006	0.736	0.593–0.879	0.006	0.811	0.648–0.974	0.001	0.793	0.650–0.935	0.001
RV septal LSS	0.778	0.583–0.973	0.029	0.727	0.575–0.879	0.008	0.604	0.400–0.809	0.262	0.637	0.469–0.805	0.115
RV global LSS	0.905	0.805–1.00	0.002	0.779	0.639–0.919	0.001	0.777	0.605–0.949	0.003	0.806	0.668–0.943	0.001
RV GLOBAL LSR	0.802	0.650–0.953	0.018	0.789	0.656–0.922	0.001	0.769	0.618–0.920	0.004	0.812	0.693–0.931	0.001

Underline and italic indicates significant difference (p < 0.05)
AUROC area under receiver operating characteristic, RV right ventricle, STE speckle-tracking echocardiography, LSS longitudinal systolic strain, LSR longitudinal systolic strain rate, TAPSE tricuspid annular plane systolic excursion, FAC fractional area change, S′ peak systolic velocity of tricuspid annulus by pulsed wave Doppler tissue imaging, ED RV:LV end diastolic right ventricular over left ventricular diameter ratio