[Parameters of the bioelectrical activity of the heart conduction system in virtually healthy persons]

Intracardiac conduction was studied on the basis of the conception of the atrial spike potentials. Intracavitary electrograms were recorded from the right atrium, zone of the bundle of His, and the esophagus in 110 persons in 35 of whom no abnormalities were found in the heart and the results of the examination were accepted as control indices. On the grounds of the investigations conducted by them, the authors determined the shape, amplitude, and time of appearance of the spike potentials of the sinus rhythm, atria, and the bundle of His and also the duration of the intervals of intracardiac conduction. Study of the phenomena of bioelectric activization of the atria and the system of the bundle of His in a complex significantly widens the possibilities of selective assessment of disorders of intracardiac conduction at various levels of propagation of the stimulation.