1. Mortality Statistics for Cardiovascular Disease in Russia and the World, World Health Organization; https://www.who.int/ru/news-room/factsheets/detail/cardiovascular_diseases-(cvds) (accessed June 3, 2019)
2. “Interrogation of patient smartphone activity tracker to assist arrhythmia management,” Ann. Emerg. Med.; https://www.annemergmed.com (accessed June 3, 2019).
3. Federal Clinical Guidelines for the Diagnosis and Treatment of Impairments to Cardiac Rhythm and Conduction, Compiled by Golitsyn, S. P. (lead), Kropacheva, E. S., Maikov, E. B., et al., Moscow (2013).
4. Portable Electrocardiograph ECGC-01, website of the company Valenta; http://valenta.spb.ru (accessed June 3, 2019).
5. Alivecor, website of the company Alivecor; https://www.alivecor.com/ (accessed June 3, 2019).