title: Regional and overall ventilation-perfusion ratios in normal subjects and patients with chronic lung disease.
mesh_terms: D001991:Bronchitis / Q000503:physiopathology*; D002245:Carbon Dioxide; D002302:Cardiac Output; D002908:Chronic Disease; D004395:Dye Dilution Technique; D006801:Humans; D008433:Mathematics; D008722:Methods; D010100:Oxygen; D010313:Partial Pressure; D011652:Pulmonary Circulation; D011656:Pulmonary Emphysema / Q000503:physiopathology*; D011868:Radioisotopes; D012129:Respiratory Function Tests; D013147:Spirometry; D014692:Ventilation-Perfusion Ratio; D014978:Xenon
chemical_list: D011868:Radioisotopes; D002245:Carbon Dioxide; D014978:Xenon; D010100:Oxygen