Mayo Clinic cardiologist on identifying risks of hydroxychloroquine for coronavirus treatment

The FDA is warning against the use of hydroxychloroquine for the treatment of Covid-19. This follows the release of study results published in the Journal of the American Medical Association that showed some Covid-19 patients treated with the drug developed irregular heartbeats. Dr. Michael Ackerman, cardiologist at the Mayo Clinic, joins "Squawk Box" to discuss.