Is heart rate a reliable index of exercise tolerance in chronic bronchitis and silicosis?
D001991:Bronchitis / Q000503:physiopathology*; D002908:Chronic Disease; D006334:Heart Function Tests; D006339:Heart Rate; D006801:Humans; D005082:Physical Exertion; D012129:Respiratory Function Tests; D012829:Silicosis / Q000503:physiopathology*