title: Report from the Joint Study on the Natural History of Congenital Heart Defects. III. Indirect assessment of severity. Introduction.
mesh_terms: D000293:Adolescent; D000328:Adult; D001024:Aortic Valve Stenosis / Q000175:diagnosis* / Q000503:physiopathology; D006328:Cardiac Catheterization; D002648:Child; D002675:Child, Preschool; D006345:Heart Septal Defects, Ventricular / Q000175:diagnosis* / Q000503:physiopathology; D006439:Hemodynamics; D006801:Humans; D011666:Pulmonary Valve Stenosis / Q000175:diagnosis* / Q000503:physiopathology