For citations:

Safronenko V.A., Chesnikova A.I. Frequency of adverse outcomes in hypertensive patients aged 80 years and older depending on heart failure and frailty syndrome. Russian Journal of Cardiology. 2025;30(3):6261. (In Russ.) https://doi.org/10.15829/1560-4071-2025-6261. EDN: SQLHPX