Paul A. Friedman, M.D., a Mayo Clinic cardiologist, hosts the Mayo Clinic Cardiovascular Grand Rounds series on COVID-19. Michael J. Ackerman, M.D., Ph.D., who is the Windland Smith Rice Cardiovascular Genomics Research Professor, reviews the mechanisms of drug-induced sudden cardiac death in the setting of COVID-19. Peter A. Noseworthy, M.D., director of the Heart Rhythm and Physiological Monitoring Laboratory at Mayo Clinic, discusses various ECG approaches for QT monitoring, including mobile device technology, in the setting of COVID-19.