[Clinical diagnosis of asthma]

Paroxysmal wheezing dyspnea, asthma may evolve from a simple crisis to an asthmatic attack that repeats several crises daily with duration up to several weeks, in some months when the asthmatic illness becomes life-threatening. Chronology of asthma is related to bronchial inflammation without knowing how to avoid the development of complications. Childhood types and those of subjects of more than 65 years are well characterised by mechanisms of bronchial hyper-reactivity that are always found and are identical to the type found in young adults. There are "limited" types that need respiratory function tests for confirmation of asthma.