asthma

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Related to Allergic Asthma: allergic rhinitis

asthma

(ăz`mə, ăs`–), chronic inflammatory respiratory disease characterized by periodic attacks of wheezing, shortness of breath, and a tight feeling in the chest. A cough producing sticky mucus is symptomatic. The symptoms often appear to be caused by the body's reaction to a trigger such as an allergen (commonly pollen, house dust, animal dander: see allergyallergy,
hypersensitive reaction of the body tissues of certain individuals to certain substances that, in similar amounts and circumstances, are innocuous to other persons. Allergens, or allergy-causing substances, can be airborne substances (e.g.
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), certain drugs, an irritant (such as cigarette smoke or workplace chemicals), exercise, or emotional stress. These triggers can cause the asthmatic's lungslungs,
elastic organs used for breathing in vertebrate animals, excluding most fish, which use gills, and a few amphibian species that respire through the skin. The word is sometimes applied to the respiratory apparatus of lower animals.
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 to release chemicals that create inflammation of the bronchial lining, constriction, and bronchial spasms. If the effect on the bronchi becomes severe enough to impede exhalation, carbon dioxide can build up in the lungs and lead to unconsciousness and death. Following a steady 30-year decline, asthma deaths in the United States, especially among poor, inner-city blacks and among the elderly, began to rise from the late 1970s through the early 1990s. At the same time, the incidence of asthma also increased, both nationally and worldwide.

There is no cure for asthma. Although the disease may go through a period of quiescence, it appears that childhood asthmatics do not outgrow the disease as previously believed. Treatment includes inhaled or oral steroids or bronchodilators (albuterol, theophylline), breathing exercises, and, if possible, the identification and avoidance of triggers.

asthma

[′az·mə]
(medicine)
A pulmonary disease marked by labored breathing, wheezing, and coughing; cause may be emotional stress, chemical irritation, or exposure to an allergen.

asthma

a respiratory disorder, often of allergic origin, characterized by difficulty in breathing, wheezing, and a sense of constriction in the chest
References in periodicals archive ?
Results demonstrate clinically significant reduction in allergic asthma attacks and further define Xolair safety profile in children age six through 11 - this includes 11-year-old children, up to their 12th birthday
As with allergic asthma, essential to managing intrinsic asthma is learning to recognize one's triggers.
com, for asthmatic athletes, to help them recognize the difference between exercise-induced asthma and allergic asthma, the latter of which is triggered by a variety of factors.
Efficacy and tolerability of anti-asthma herbal medicine intervention in adults with moderate-severe allergic asthma.
The drug, developed by Novartis, is recommended for patients with persistent allergic asthma who have severe problems such as reduced lung function, despite using high dose inhaled treatments.
Britannia has done excellent work in creating this compound and laying the foundation clinically, and airPharma will take the next steps through efficacy studies in patients with allergic asthma and other respiratory indications.
SAN FRANCISCO -- When added to standard therapies, omalizumab, an anti-IgE antibody, appears effective for patients who have both moderate to severe allergic asthma and persistent allergic rhinitis, according to a poster presented by Dr.
Unanimously approved by a government advisory committee in May, Xolair is a promising drug for treating people with allergic asthma.
A study of 20 college students with mild allergic asthma found that the percentage of sputum eosinophil counts was significantly higher both 6 hours and 24 hours after an antigen challenge during final exam week than during a less stressful time (Am.
Xolair, Tanox's most advanced product in development, is an anti-immunoglobulin E, or anti-IgE, antibody whose therapeutic effect has been validated through clinical trials in patients suffering from allergic asthma and seasonal allergic rhinitis (hay fever).
For example, allergies to airborne substances like pollen, dander and dust mites can cause a runny or stuffy nose or can cause inflammation and constriction in the bronchial tubes, which is allergic asthma.