This might have impacted directly the patients: the asymptomatic LQT1 carrier (Female, Basal QTc = 458 ms), for example, was identified in our center only through a family screening of the sibling (JLNS, Female, Basal QTc = 578 ms, symptomatic) and might have been included in one of the COVID-19 clinical trials with HCQ because in most of them the exclusion criteria for QTc were a cutoff of 480 ms. The gene discussed is KCNQ1; the disease is COVID-19.