SCN5A and ventricular fibrillation: COVID-19 = coronavirus disease 2019; ECG = electrocardiogram; ED = emergency department; ICD = implantable cardioverter-defibrillator; TTE = transthoracic echocardiography; VF = ventricular fibrillation; ROSC = return of spontaneous circulation; RT-PCR = reverse transcription-polymerase chain reaction; CPR = cardiopulmonary resuscitation; SpO2 = oxygen saturation; SCN5A = sodium voltage-gated channel alpha subunit 5; QTc = corrected QT; PMVT = polymorphic ventricular tachycardia.