1156: THE BYSTANDER EFFECT: THE INFLUENCE OF KNOWN BYSTANDER CPR AND WITNESSED ARREST ON ED CPR DURATION. (15th December 2022) - Winsten, Samuel; Organick-Lee, John; Feltes, Jordan; Brophy, Jennifer; Pierce, Ayal; Hussein, Yasir; Boone, Kirsten; Popova, Margarita; Brooks, Joseph; Yamane, David