we conclude that in asymptomatic subjects with asthma and ragweed hypersensitivity a ) peripheral airway dysfunction is frequently present , b ) during antigen challenge visov may be a more sensitive indicator of airway response than sgaw , and c ) the beta-adrenergic agonist isoetharine exhibits its bronchodilator effect in both central and peripheral airways following antigen challenge .
C0004096
asthma
C0022176
isoetharine