1643: RISK FACTORS FOR NEW-ONSET ATRIAL FIBRILLATION IN CRITICALLY ILL SEPTIC PATIENTS. - Sulejmani, Essilvo; Harding, Kate; Gerlach, Anthony; Arnold, Joshua; Magrum, BrookeAnne; Smith, Adam; Gage, Paul; Wang, Megan; Ogake, Stella; Doepker, Bruce (Critical Care Medicine, 2026)