Fig. 5

Time-course of right ventricular 2-dimensional echocardiographic parameters. a Right ventricular fractional area change (RV-FAC); b Right ventricular end-diastolic diameter (RVEDD); c Tricuspid annular systolic velocity (TASV); d right ventricular global longitudinal strain (RV GLS). *p < 0.05; **p < 0.01. Red asterisk: 0 ppm group compared to baseline; blue asterisk: 20 ppm group compared to baseline; black asterisk: between groups at specific time-point