Asthma

It is chronic inflammation of lungs in which airways are reversibly narrowed. Asthma affects near 7% of population, or about 20 million American and 300 million people all over the world. During the attacks, smooth muscle cells in bronchi constrict and airways become swollen and inflamed. In this condition, breathing becomes more difficult and the asthma causes about 4,000 deaths every year in U.S. these types of attacks can prevent by avoiding triggering factors and through the drug treatment, where drugs are mostly used for the acute attacks and inhaled commonly ß2-agonists. Drug is used for the long-term prevention, in more serious cases.

 

Chronic bronchitis and chronic obstructive pulmonary disease, in contrast, inflammation of asthma is reversible. Asthma affects bronchi no alveoli. National Heart, Blood and Lung institute defines asthma as common chronic disorder of airways that is characterized by the recurring and variable symptoms, obstruction, airflow and underlying inflammation. The public attention in developed world has recently focused on asthma due to rapidly increase prevalence and affecting up to 1 in 4 urban children.

 

Because of spectrum of severity within asthma, asthmatic (some patients) only experience symptoms rarely and in responses to triggers usually, where other more sever the asthmatic that may have marked obstruction of airflow at the times.

It the common symptoms of asthma in steady-state include shortness of breath, nighttime coughing, chronic 'throat-clearing' type of cough and the complaints of tight felling in chest.

 

Severity correlates to increase in the symptoms that can also worsen gradually and insidiously, it is up to point of acute the exacerbation of asthma and is common misconception that almost all asthmatic verve wheezes and their disease may also be confused with another obstruction pulmonary disease such as chronic bronchitis or emphysema. Asthma is also caused by the genetic factors and environmental affects that can influence how asthma severe is respond and how it is to medication.

 
 
 
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