Rybchynskyi SV, Brynza MS, Volkov DY, Yabluchanskyi MI. The electrical axis of the heart in patients with atrial fibrillation before and after radiofrequency ablation. Zaporozhye Medical Journal [Internet]. 2018Sep.24 [cited 2024May5];(5). Available from: http://zmj.zsmu.edu.ua/article/view/141643