R.A. FAYZULLINA, K.A. SAFINA Kazan State Medical University of the Ministry of Health of the Russian Federation, Kazan  Contact: Fayzullina R.A. ― MD, Professor, Head of the Department of Propedeutics of Children’s Diseases and Polyclinical Pediatrics Address: 49 Butlerov Str., Kazan, Russian Federation, 420012, e-mail: r868@mail.ru  The wide prevalence of cardiovascular diseases encourages scientists to […]