“ORTHOSTATIC REACTIONS OF VENTRICULAR RATE IN PATIENTS WITH PERMANENT ATRIAL FIBRILLATION”. The Journal of V. N. Karazin Kharkiv National University, series "Medicine", no. 21 (July 4, 2015): 76–83. Accessed October 25, 2026. https://periodicals.karazin.ua/medicine/article/view/6900.