<unk> , also known as status asthmaticus, is an<unk>  exacerbation of asthma that does not respond to standard treatments of bronchodilators (inhalers) and corticosteroids. Asthma is caused by multiple genes, some having protective effect, with each gene having its own tendency to be influenced by the environment although a genetic link leading to<unk>  is still unknown. Symptoms include chest tightness, rapidly progressive dyspnea(shortness of breath), dry cough, use of accessory respiratory muscles, fast and/or labored breathing, and extreme wheezing. It is a life-threatening episode of airway obstruction and is considered a medical emergency. Complications include cardiac and/or respiratory arrest. The increasing prevalence of atopy and asthma remains unexplained but may be due to infection with respiratory viruses.
Acute severe asthma
Thunderstorm asthma
Yokkaichi asthma
Cardiac asthma
Brittle asthma
Acute bronchitis
Acute exacerbation of chronic obstructive pulmonary disease
COACH syndrome