For citations:
Boldueva S.A., Ruslyakova I.A., Zakharova O.V., Rozhdestvenskaya M.V. Complicated Course of Coronavirus COVID-19 Infection in the old Patient with Severe Cardiac Pathology: a Clinical Case Study. Kardiologiia. 2021;61(3):115-120. (In Russ.) https://doi.org/10.18087/cardio.2021.3.n1355