Table 4. Correlations Between LV Strain, Invasive Hemodynamics, & RVFW Strain.

Strain Variable	MPAP/MAP		PVRi, WU·m2		RVFW Strain, %
	r	P-Value	r	P-Value	r	P-Value
Longitudinal Strain, %
LV Global	0.16	0.28	0.19	0.18	0.41	<0.0001*
LV Free-Wall	-0.30	0.0391	-0.21	0.15	-0.02	0.82
IVS	0.50	0.0003*	0.48	0.0003*	0.62	<0.0001*
Basal Septal	0.66	<0.0001*	0.60	<0.0001*	0.64	<0.0001*
RVFW	0.55	<0.0001*	0.50	0.0002*	…	…
Circumferential Strain, %
Basal
Global	0.06	0.71	0.13	0.40	0.37	0.0004*
Septum (6, 1)	-0.07	0.67	0.002	0.99	0.37	0.0004*
Septal (6)	-0.16	0.30	-0.06	0.68	0.35	0.0009*
Anteroseptal (1)	0.04	0.82	0.05	0.75	0.33	0.0014
Free-Wall (2, 3, 4, 5)	0.17	0.28	0.25	0.09	0.23	0.0305
Lateral (3)	0.31	0.06	0.15	0.38	0.38	0.0005*
Mid
Global	0.15	0.30	0.30	0.0349	0.26	0.0127
Septum (6, 1)	0.16	0.30	0.31	0.0304	0.27	0.0077
Septal (6)	0.08	0.30	0.28	0.0501	0.24	0.0215
Anteroseptal (1)	0.25	0.82	0.33	0.0201	0.26	0.0128
Free-Wall (2, 3, 4, 5)	0.09	0.54	0.15	0.29	0.14	0.18
Lateral (3)	0.37	0.0105	0.27	0.056	0.25	0.0147
Posterior (4)	0.15	0.32	0.12	0.40	0.29	0.0066

P<0.001 considered significant. LV indicates left ventricle; RVFW, right ventricular free-wall; MPAP/MAP, mean pulmonary-to-systemic arterial pressure ratio; PVRi, indexed pulmonary vascular resistance; IVS, interventricular septum; Basal Septal, average longitudinal strain of basal and mid IVS segments.