Exercise-induced asthma: fresh insights and an overview
AbstractExercise-induced asthma (EIA) is a common condition affecting 12-15% of the population. Ninety percent of asthmaticindividuals and 35-45% of patients with allergic rhinitis are afflicted by EIA, while 3-10% of the general population is alsobelieved to suffer from this condition. EIA is a condition which is more prevalent in strenuous outdoor, cold weather and wintersports. The pathophysiology of EIA continues to intrigue medical physiologists. However, the water-loss hypothesis and thepost-exertional airway-rewarming hypothesis are as yet the best accepted theories. EIA is best diagnosed by a good medicalhistory and a free-run challenge test. A post-exertion decrease by 15% in FEV1 and PEFR is diagnostic of EIA. Sensitivity ofexercise testing ranges from 55% to 80% while specificity is as high as 93%. EIA is a disorder that can be successfully treatedby combining both non-pharmacological and pharmacological treatment options. Prompt diagnosis and treatment of thiscondition is vital if we hope to provide our patients with better overall health, better social life and a better self-image.
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