id author title date pages extension mime words sentences flesch summary cache txt cord-270723-cjfglili Fteiha, Bashar QTc prolongation among hydroxychloroquine sulfate‐treated COVID‐19 patients: An observational study 2020-10-15 .txt text/plain 3317 191 50 Age > 65 years, congestive heart failure, severity of disease, C‐reactive protein level, hypokalemia and furosemide treatment, were all associated with QTc prolongation. CONCLUSION: In patients treated with HCQ, QTc prolongation was associated with the presence of traditional risk factors such as hypokalemia and furosemide treatment. All rights reserved Univariate analysis revealed that in COVID-19 patients treated with HCQ, age above 65 years, severe or critical illness, congestive heart failure, hypokalemia, furosemide treatment and increased CRP level were all significantly associated with the composite endpoint (Table 2) . However, multivariate analysis in this small dataset also suggested that in COVID-19 patients treated with HCQ, concomitant hypokalemia and furosemide treatment were strongly associated with QTc prolongation. In conclusion, our study shows that QTc prolongation among HCQ-treated patients was associated with traditional, modifiable risk factors such as hypokalemia and furosemide treatment which are both commonly observed in COVID-19 patients. ./cache/cord-270723-cjfglili.txt ./txt/cord-270723-cjfglili.txt