Tovmasian Layra A. RussiaВолгоградVolgograd State University, 100, Universitetsky Ave., Volgograd, 400062, Russialaura7709@yandex.ru Author's articles To the Question about the Reciprocal Conformity of the Transition Zone in the Chest Leads ECG, Heart Rate and Cerebral Hemodynamics The Functional State of Systemic Hemodynamics Russian and Foreign Students at Orthostasis