Treatment algorithm and follow-up
All the suspicious/confirmed cases with COVID-19 older than 18 years received HCQ for at least five days. Loading dose of HCQ was 400 mg twice daily in the first day and 200 mg twice daily for the following days. Loading dose of azithromycin was 500 mg once daily and 250 mg once daily for the next four days. Primary outcomes were critical QTc prolongation, TdP, ventricular tachyarrhythmia and sudden cardiac arrest.