MD, DMSc Academician of the Russian Academy of Sciences, Professor of the Department of Neurosurgery at the S.M. Kirov Military Medical Academy, Ministry of Defense of Russia; Honored Scientist of the Russian Federation; Head of the S.M. Kirov Military Medical Academy, Ministry of Defense of Russia (2000‒2007); Vice-president of the Association of Neurosurgeons of the Russian Federation; member of the Neurosurgery Section at the Scientific Medical Board of the Ministry of Health of Russia; board member of the Scientific Medical Board of the Main Military Medical Directorate of the Ministry of Defense of Russia; Head of the Thesis Committee for DMSc theses; Editor-in-Chief of several research journals, including Bulletin of the Russian Military Medical Academy and Russian Neurosurgery; member of editorial boards of the journals Neurosurgery, Clinical Medicine, and Pathophysiology, board member of the Saint-Petersburg Association of Neurosurgeons named after Prof. I.S. Babchin.

Dr. Gaidar’s scientific interests range from traumatic brain injury and mine blast injuries of the central nervous system to neurological oncology and vascular neurosurgery. In 1990, he successfully defended his DMSc thesis describing the main principles of cerebral hemodynamics optimization in neurosurgical pathology of the brain. In his thesis, he developed a method of noninvasive evaluation of cerebral hemodynamics during the acute stage of traumatic brain injury and brain disorders.

Dr. Gaidar has coauthored more than 200 research papers, including 2 monographs, 2 books, 4 guidelines for doctors, 2 textbooks, 7 training manuals, 2 guidance manuals and recommendations, 3 subject collections; 29 research articles have been published in international peer-reviewed journals. Total number of his works published is 120.