INTRODUCTION:
Asthma is a chronic, reversible, obstructive airway disease, characterized by wheezing. It is caused by a spasm of the bronchial tubes, or the swelling of the bronchial mucosa, after exposure to various stimuli.
Asthma is the most common chronic disease in childhood. Most children experience their first symptoms by 5 years of age.
ETIOLOGY:
Asthma commonly results from [...]
1. An asthma attack may occur spontaneously or in response to a trigger. Either way, the attack progresses in the following manner:
There is an initial release of inflammatory mediators from bronchial mast cells, epithelial cells, and macrophages, followed by activation of other inflammatory cells
Alteration of autonomic neural control of airway tone and epithelial integrity occur [...]
Bronchial asthma is a chronic inflammatory disease of the airways, associated with recurrent, reversible airway obstruction with intermittent episodes of wheezing and dyspnea. Bronchial hypersensitivity is caused by various stimuli, which innervate the vagus nerve and beta adrenergic receptor cells of the airways, leading to bronchial smooth muscle constriction, hypersecretion of mucus, and mucosal [...]
