Schmidt, O.Y., Volkov, D.Y., Brynza, M.S., Uvarova К.H. and Pavlova, D.Y. 2022. Association of atrial fibrillation and atrial flutter with sick sinus syndrome: a review of the issue based on examples of clinical observations. Zaporozhye мedical journal. 24, 2 (Apr. 2022), 240–247. DOI:https://doi.org/10.14739/2310-1210.2022.2.248102.