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 4 Correlation coefficients (Pearson) between echocardiography and clinical variables

Echocardiography parameters	Hemodynamic				Respiratory
Echocardiography parameters	Duration of vasopressor support	Duration of inotropic support	LVEF	Cardiac output	PaO2: FiO2 ratio	PEEP	Driving pressure
RV STE-derived parameters
RV inferior LSS %	− 0.119	0.363*	− 0.155	− 0.259	− 0.403*	0.082	− 0.066
RV lateral LSS%	− 0.160	0.384*	− 0.301*	− 0.379*	− 0.304*	− 0.042	− 0.187
RV septal LSS%	0.133	0.465*	− 0.496*	− 0.395*	− 0.098	0.044	− 0.296
RV global LSS%	− 0.090	0.471*	− 0.335*	− 0.390*	− 0.353*	0.033	− 0.194
RV global LSR s⁻¹	− 0.245	0.320	− 0.294*	− 0.457*	− 0.175	− 0.144	− 0.037
RV conventional parameters
TAPSE mm	− 0.143	− 0.489*	0.288*	0.300*	0.098	− 0.138	0.034
RV FAC%	0.009	− 0.251	0.014	0.199	0.026	0.154	− 0.145
S’ cm s⁻¹	− 0.036	− 0.288	0.357*	0.415*	0.162	− 0.024	0.004

Underline and * indicate significant correlation (p < 0.05); italic font: no significant correlation
RV/LV right/left 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, EF ejection fraction, PEEP positive end-expiratory pressure