Fig. 2

Correlations of ventricular-arterial coupling (VAC) with E’ velocity and left ventricular (LV) global longitudinal strain (GLS) stratified by ejection fraction (EF). The relationship between VAC and E’ velocity in patients with (A) EF ≥ 50% and (B) EF < 50%. The relationship between VAC and LV GLS in patients with (C) EF ≥ 50% and (D) EF < 50%