title: [Effect of oxygen on the regional distribution of ventilation-perfusion in the lung and the right ventricular ejection fraction--assessment using Xe-133 and Kr-81m].
mesh_terms: D000280:Administration, Inhalation; D000368:Aged; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D007726:Krypton; D008173:Lung Diseases, Obstructive / Q000503:physiopathology*; D008875:Middle Aged; D010102:Oxygen Inhalation Therapy; D011652:Pulmonary Circulation; D011868:Radioisotopes; D013318:Stroke Volume; D014397:Tuberculosis, Pulmonary / Q000503:physiopathology; D014692:Ventilation-Perfusion Ratio; D014980:Xenon Radioisotopes
chemical_list: D011868:Radioisotopes; D014980:Xenon Radioisotopes; D007726:Krypton