(A) Illustration depicts a cross-sectional view of a normal and mature
four chambered heart. (B) Location of primum (arrowhead) and secundum (arrow)
ASD in human heart diagram which has been recapitulated in
Gata4Δex2/WT
(G4D) mouse model (C). (D, E) Schematics display similar
features of perimembranous and muscular VSDs (arrowhead) seen in human CHD
patients were also detected in
Nkx2–5+/− mice (G, H). (F) The
diagram represents AVSD phenotype with single valve (arrow) noted in humans,
resembled by the G4D murine model (I). RA: right atrium; RV:
right ventricle; LA: left atrium; LV: left ventricle; MV: mitral valve; AV:
aortic valve; PV: pulmonary valve; TV: tricuspid valve; Ao: Aorta; Pa: Pulmonary
artery; ASD: atrial septal defect; VSD: ventricular septal defect; AVSD:
atrioventricular septal defect. (C, F, I) and (G, H) have been adapted from
Rajagopal et al. 2007 and Winston et al. 2010 with permission.