Chapter 5. Mechanisms of changes in dynamic complexity of EEG patterns in case of heart rhythm disturbances

Abstract

The fifth chapter descibes the wavelet and recurrence analysis of changes occurring in reactive EEG patterns in disorders of the functional state of the central nervous system associated with cardiac arrhythmias of varying severity. It has been shown that individuals with paroxysmal atrial fibrillation are characterized by a significant assimilation of the rhythm of the frequencies of both the alpha and theta ranges, which may be associated with the development of instability of neurodynamic processes as a result of the appearance of a pathological focus of excitation in the central nervous system. In contrast to this, the weak photic driving reaction of the frequencies of the alpha range observed in persons with a constant form of atrial fibrillation and the pronounced reaction of the frequencies of the theta range may indicate the predominance of inhibition processes in the nervous system of these patients due to chronic hypoxia of the brain.