Study of 294 SLE pts on HCQ (2005-2021): 37 (13%) developed CHF w/ low EF (HFrEF), arrhythmia or cardiac death. After adjustments, wt-based dosing of HCQ not assoc w/ cardiac events(sHR 0.62; 0.41,0.92) & may decrease risk in non-smokers https://t.co/11dneH04bv https://t.co/pp0ELe5mqV