TABLE 6.

Relationship between ventriculo-arterial coupling and left ventricular efficiency and Ea_dyn according to a mixed-effect regression model.

		95% confidence
Fixed effects	Estimate	interval	p value
Ventriculo-arterial coupling indexes
VAC (Ea/Ees)	–0.414	−0.486 to −0.343	<0.001
Ees, mmHg⋅ml–1	2.271	1.766 to 2.776	<0.001
Ea, mmHg⋅ml–1	–0.933	−1.196 to −0.671	<0.001
Left ventricular energetics
LVeff,%	0.026	0.021 to 0.031	<0.001
Stroke work, mmHg⋅l	0.107	0.079 to 0.134	<0.001
Potential energy mmHg⋅l	–0.121	−0.160 to −0.082	<0.001

Estimates reflect the average change in Ea_dyn per unit increase of the fixed effect. Ea_dyn, dynamic arterial elastance; Ees, left ventricular end-systolic elastance; Ea, effective arterial elastance; VAC, ventriculo-arterial coupling; LV_eff, left ventricular mechanical efficiency.