Heart conduction disorders related to antimalarials toxicity: an analysis of electrocardiograms in 85 patients treated with hydroxychloroquine for connective tissue diseases

Abstract

PR interval, QTc interval and heart rate were not different from normal values. The rate of heart conduction disorders was similar to what is expected in the general population, and contrasted with prior results in CQ-treated patients. Our results add further evidence on the safety of HCQ compared with CQ.