For citations:

Druyan L.I., Kalinin A.L., Krivelevich N.B. PROPEDEUTICS ASPECTS OF UNDERSTANDING OF ATRIOVENTRICULAR CONDUCTION AND ITS ELECTROCARDIOGRAPHIC REFLECTION. Health and Ecology Issues. 2016;(1):7-13. (In Russ.) https://doi.org/10.51523/2708-6011.2016-13-1-2