Correlation between ductus venosus spectrum and right ventricular diastolic function in isolated single-umbilical-artery foetus and normal foetus in third trimester

Figure 4 Scatterplots of the correlations between the ventricular late diastolic velocity/ventricular diastolic peak flow velocity and early passive/late active ratio of the isolated single umbilical artery (R² = 0. 520) and control (R² = 0.358). A: Control group; B: Isolated single umbilical artery (SUA) group. v/D: Ventricular late diastolic velocity/ventricular diastolic peak flow velocity; E/A: Early passive/late active.