Yu.M. CHILIKINA, D.I. SADYKOVA Kazan State Medical University Chilikina Julia Mikhaylovna graduate student at the Department of hospital pediatrics with the  courses of outpatient pediatrics and postgraduate education 49 Butlerova Str., Kazan 420012 tel. (843) 237-30-37, e-mail: juliakazan@list.ru  The article describes the current understanding of the possible causes and development of rhythm and conduction disturbances […]