Asthma is a common chronic inflammatory disease of the airways characterized by variable and recurring symptoms, reversible airflow obstruction and bronchospasm. Common symptoms include wheezing, coughing, chest tightness, and shortness of breath.
Asthma is thought to be caused by a combination of genetic and environmental factors Its diagnosis is usually based on the pattern of symptoms, response to therapy over time and spirometry It is clinically classified according to the frequency of symptoms, forced expiratory volume in one second (FEV1), and peak expiratory flow rate. Asthma may also be classified as atopic (extrinsic) or non-atopic (intrinsic) where atopy refers to a predisposition toward developing type 1 hypersensitivity reactions.
Treatment of acute symptoms is usually with an inhaled short-acting beta-2 agonist (such as salbutamol) and oral corticosteroids. In very severe cases, intravenous corticosteroids, magnesium sulfate, and hospitalization may be required. Symptoms can be prevented by avoiding triggers, such as allergens and irritants, and by the use of inhaled corticosteroids. Long-acting beta agonists (LABA) or antileukotriene agents may be used in addition to inhaled corticosteroids if asthma symptoms remain uncontrolled. The occurrence of asthma has increased significantly since the 1970s. In 2011, 235-300 million people globally were diagnosed with asthma, and it caused 250,000 deaths.
Do You Think Asthma Is Curable? Epoch Times - December 7, 2015
Asthma has become a very common chronic disease that affects more than 300 million people around the world. In the next 10 years, the number of people affected is expected to increase to 400 million. Daily in the United States, more than 40,000 people miss work or school, and over 5,000 people visit emergency rooms because of asthma. That total adds up to 2 million ER visits per year that are related to asthma in one way or another, according to the Centers for Disease Control and Prevention (CDC).
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