Rybchynskyi, S. V., Brynza, M. S., Volkov, D. Y., & Yabluchanskyi, M. I. (2018). The electrical axis of the heart in patients with atrial fibrillation before and after radiofrequency ablation. Zaporozhye Medical Journal, (5). https://doi.org/10.14739/2310-1210.2018.5.141643