Athanasios Chalkias, MD, MSc, PhD, FESC, FAcadTM, FCP, FESAIC, is an anesthesiology and critical care medicine physician–scientist. His clinical and research work are dedicated to critical care medicine, circulatory dynamics, heart-lung interactions, hemodynamics, applied cardiopulmonary physiology, and critical care anesthesiology. Building on this foundation, his expertise extends to volume conditions of the cardiovascular system, venous return, the mechanical and physiological interplay of the heart and lungs, cardiac output, ventriculo-arterial coupling, hemodynamic coherence and microcirculation, organ perfusion, oxygen transport to tissue, shock, resuscitation, advanced hemodynamic support, individualized physiology-guided management, and the optimization of circulatory dynamics in critically ill patients, as well as in high-risk patients undergoing major surgery. He is the I.P. Chair of the SW&TF Subcommittee and a member of the Committee on Research of the Society of Critical Care Anesthesiologists, a member of the Trauma and Resuscitation Scientific Forum of the European Society of Anaesthesiology and Intensive Care, an active member of the Outcomes Research Consortium, and a member of the Council on Basic Cardiovascular Science of the European Society of Cardiology. Prof. Chalkias is listed among Stanford and Elsevier’s Global Top 2% Scientists for the years 2024 and 2025.