title: R-wave amplitude changes during exercise in adolescents with left ventricular pressure and volume overload.
mesh_terms: D000293:Adolescent; D001017:Aortic Coarctation / Q000503:physiopathology*; D001022:Aortic Valve Insufficiency / Q000503:physiopathology; D001024:Aortic Valve Stenosis / Q000151:congenital / Q000503:physiopathology*; D002306:Cardiac Volume; D002648:Child; D004562:Electrocardiography; D005260:Female; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008944:Mitral Valve Insufficiency / Q000503:physiopathology; D005082:Physical Exertion; D011312:Pressure