Assertion: qtc prolongation | /r/HasProperty | 499 milliseconds
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Source sentences:
text: One patient who had hydroxychloroquine and azithromycin discontinued because of QTc prolongation (499 milliseconds) developed torsades de pointes 3 days later (eFigures 2 and 3 in the Supplement) and subsequently developed other ventricular arrhythmias that were treated with lidocaine.