ABSTRACT
It has been shown by periodographic computer analysis that ultradian rhythms of all examined parameters (bronchial resistance, inhalation, exhalation and breathing cycle duration, inspiration activity index, pneumographic amplitude, inhalation rate) of bronchopulmonary pattern in asthmatics and normal subjects exhibit latent periodicity, with prevailing oscillations of about 60 sec. during spontaneous breathing or under exposures. changing bronchial potency. Slow-wave components form very complex poly-harmonical temporal structure with specific organization during air breathing and response to challenge tests. Bronchospasm provoked by inhalation of acetylcholine produced an abrupt decrease of the number of periodical ultradian components (or even total disappearance of oscillations) and the development of a rigid hypersynchronic temporal structure on the basis of the hypersynchronized ultradien fluctiations. The principal factors of this new system may be changes of airway resistance. Analysis of our data suggests that the phenomenon of bronchial hyper-reactivity may be associated with a disturbance in temporal organization of the cardiobronchopulmonary pattern. Development of temporal disorganization may have some pathogenetic stages such as hypersynchronization, disrhythmy, appearance of a rigid temporal structure and bronchospasm as a clinical result.
