Fig. 1: Changes in loading conditions before and after patent ductus arteriosus ligation.
From: Biventricular adaptation after patent ductus arteriosus ligation

a The hemodynamic interplay of patent ductus arteriosus (PDA) across cardiac chambers. b Changes from normal longitudinal left ventricular strain to decreased strain after patent ductus arteriosus ligation. LV left ventricle, LA left atrium, RV right ventricle, RA right atrium, 4Ch four chamber.