Clinical asthma is estimated to occur in 4 to 7 percent of the US population, but respiratory symptoms are much more common. The correlation between asthma, tests of bronchial hyperresponsiveness, and symptoms is imprecise and difficult to ascertain. The prevalence of exercise-induced airflow obstruction is not well known in healthy adults. We studied 100 consecutive US Air Force members to det...

BACKGROUND Although the nose and the bronchi are both involved in the process of regulating respiratory heat exchange, thermal changes may precipitate airway obstruction during exercise but rarely cause nasal obstruction in patients with rhinitis. The cause of the different response of the nose and bronchial tree has hardly been investigated. This study was performed to assess the response of t...

Exercise-induced asthma/exercise-induced bronchospasm (EIA/EIB) is a prevalent and clinically important disease affecting young children through older adulthood. These terms are often used interchangeably and the differences are not clearly defined in the literature. The pathogenesis of EIA/EIB may be different in those with persistent asthma compared to those with exercise-induced symptoms onl...

Exercise-induced bronchoconstriction (EIB) is the term used to describe the transient narrowing of the lower airways that follows vigorous exercise.1,2 Although EIB most commonly occurs in individuals with clinically recognized asthma, this condition is also reported in school children, armed forces recruits and elite athletes without asthma. Patients typically present with respiratory symptoms...

Serial exercise tests were carried out by 12 children with asthma on two study days. After a control exercise test either nedocromil sodium 4 mg or placebo were given double blind by metered dose inhaler. Highly significant inhibition of exercise induced asthma occurred after nedocromil, lasting for over two hours.

Asthma continues to be a clinically important disease despite decreasing mortality from the condition. Asthma prevalence, as well as urgent office appointments, emergency department visits, and hospitalizations associated with asthma, are all increasing in the United States and globally.1,2 Multiple theories exist regarding the increase in prevalence, but most authorities agree that the increas...

Objective. To compare longitudinally PAC of asthmatic children against that of healthy controls during ten months. Methods. Twenty-eight asthmatic children aged 7-15 years and 27 matched controls each performed six submaximal exercise tests on treadmill, which included a test of EIA (exercise-induced asthma). Predicted aerobic capacity (mLO(2)/min/kg) was calculated. Spirometry and development ...

A 13-year-old elite swimmer presented with wheezing after indoor swimming training. On the basis of her clinical history and the tests performed, exercise-induced asthma and mold-induced asthma were ruled out and a diagnosis of chlorine-induced asthma was made.