Schematic coronal sections through WT (a) and HF (b) hearts scaled from MR images at 24 weeks. Chamber dilatation is evident in both ventricles, while wall thinning is apparent in the LV septal and free wall. The imaging plane identifies the location of the MR axial cross section, where measurements were taken to scale the drawings. LV, left ventricle; RV, right ventricle; LA, left atrium; RA, right atrium; MV, mitral valve; TV, tricuspid valve; AV, aortic valve; PV, pulmonary valve; SW, septal wall; FW, free wall; IP, imaging plane.