<unk>  is defined by a drop in forced expiratory volume in 1 second (FEV1) of at least 15% between bedtime and awakening in patients with clinical and physiologic evidence of asthma. The pathophysiology of<unk>  is closely associated with the chronobiology and the science of biologic processes that have time-related rhythms. Hence, understanding the circadian rhythm is important to interpret the changes in pulmonary function that occurs in sleeping asthmatics. A large population based study reported dyspneic episodes without therapy in asthmatics occurred between 10 P.M. and 7 A.M. Another population based survey that assessed 7729 patients, reported approximate 74% patients woke-up at least once a week with symptoms, 64% woke-up three times per week, and 39% patients woke-up every night with symptoms.
Nocturnal asthma
Sleep apnea
Status asthmaticus
Central sleep apnea
Exercise induced asthma
Smoker's cough
Sleep Apnea
Asthma