Brynza, M. S., & Yabluchanskіy M. I. (2018). EHRA classes, additional cardiovascular risk and quality of life in patients during the first six months of atrial flutter and atrial fibrillation radiofrequency. Zaporozhye мedical Journal, (3). https://doi.org/10.14739/2310-1210.2018.3.132107