For citations:
Petrov V.S. Heart rate variability in patients with chronic rheumatic heart disease. The Russian Archives of Internal Medicine. 2019;9(6):434-440. https://doi.org/10.20514/2226-6704-2019-9-6-434-440
Petrov V.S. Heart rate variability in patients with chronic rheumatic heart disease. The Russian Archives of Internal Medicine. 2019;9(6):434-440. https://doi.org/10.20514/2226-6704-2019-9-6-434-440