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Asthma is a chronic inflammatory condition in which the airways undergo changes when
stimulated by allergens or other environmental triggers that causes an inability to
breathe properly. There is inflammation, hyperresponsiveness and at least partial
obstruction of the airways that cause both short and long-term symptoms. There is also
excessive production of mucus.
The heightened responsiveness of asthmatic airways causes reactions to stimuli that
trigger little or no change in the airways of normal subjects. The cause of this
hyperresponsiveness is not clearly understood. There is some evidence that chronic
inflammation may play a role.
The cause of asthma is multifactorial and includes both hereditary and environmental
factors. Most cases of asthma are thought to be related to the presence of allergies,
however not all persons with allergies have asthma and not all cases of asthma can be
attributed to allergies.
Asthma affects up to 10% of the population or almost 15 million Americans. The prevalence
of asthma has risen dramatically over the past several decades, the reasons for which are
not known.
Asthma is treated with a variety of medications, both oral and inhaled. Intravenous
medications and oxygen may be necessary in acute attacks.
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The Medifocus Guide on Asthma provides answers to the following important questions and
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What Your Doctor Reads:
This MediFocus Guide contains an extensive listing of citations and abstracts of
recent journal articles that have been published about this condition in trustworthy
medical journals. This is the same type of information that is available to physicians and
other health care professionals. A partial selection of journal articles that are
abstracted in this MediFocus Guide includes:
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