abnormal cardiac epithelial to mesenchymal transition
abnormal cardiac mesenchyme morphology
abnormal cardiac neural crest cell morphology +
abnormal cardiac outflow tract development +
abnormal cardiogenic mesoderm morphology
any structural anomaly of the splanchnic mesoderm in the cardiogenic region where the heart develops; it gives rise to endocardial heart tubes that fuse to form the primordial cardiac tube, the heart primordium