SPECTRAL ANALYSIS OF HEART RATE VARIABILITY OF ATRIAL FIBRILLATION PATIENTS. J. V. N. Karazin Khark. Nat. Univ., Ser. Med. [Internet]. 2015 Jul. 4 [cited 2026 Oct. 25];(2):35-9. Available from: https://periodicals.karazin.ua/medicine/article/view/7430