Congenital CV defects fall in several different categories (Table 4.05):
Incomplete closure of fetal structures includes ASD with or without pulmonary arterial hypertension and right ventricle enlargement, patent ductus arteriosus, and patent ductus venosus. Malformation of septation includes VSD with or without tricuspid valve involvement and ASD not involving the foramen ovale.
Malformation of the great vessels includes aortic coarctation, truncus arteriosus, dextrocardia with or without transposition of the great vessels, and anamolous communications of the coronary vessels. Malformations of the valves includes pulmonary stenosis, and atresia (absence) of the tricuspid, mitral, and pulmonic valves.
Tetralogy of Fallot is a condition involving a combination of developmental defects.
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