Zofia Czaplińska-Paszek, Kornelia Rynkiewicz, Natalia Bogusz and Sławomir Paszek 2026. SUDDEN CARDIAC ARREST DURING MASS RUNNING EVENTS IN THE CONTEXT OF THE 2025 EUROPEAN RESUSCITATION COUNCIL GUIDLINES AND CURRENT SCIENTIFIC EVIDENCE. International Journal of Innovative Technologies in Social Science. 1(49) (Feb. 2026). DOI:https://doi.org/10.31435/ijitss.1(49).2026.4897.