title: Estimation of severity of aortic valve stenosis by radionuclide ventriculography.
mesh_terms: D001022:Aortic Valve Insufficiency / Q000000981:diagnostic imaging; D001024:Aortic Valve Stenosis / Q000000981:diagnostic imaging*; D006328:Cardiac Catheterization; D006352:Heart Ventricles / Q000000981:diagnostic imaging*; D006801:Humans; D009200:Myocardial Contraction; D011877:Radionuclide Imaging; D013318:Stroke Volume; D013599:Systole; D013667:Technetium
chemical_list: D013667:Technetium