asthma definition
Definition: Asthma. Asthma. Asthma is a chronic lung disorder that causes airways (the tubes that carry air into and out of the lungs) to become inflamed, which means that they swell and produce lots of thick mucus. The muscles surrounding the airways also tend to tighten, which makes the already clogged airways even narrower.
KEY POINTS: DEFINITION, PATHOPHYSIOLOGY AND. PATHOGENESIS OF ASTHMA, AND NATURAL HISTORY OF. ASTHMA.  Asthma is a chronic inflammatory disorder of the airways. This feature of asthma has. implications for the diagnosis, management, and potential prevention of the disease.