635884 external_news 1591067345 1592197005 The malaria drug hydroxychloroquine, which has been promoted as a potential treatment for Covid-19, is known to have potentially serious effects on heart rhythms. Now, corresponding author Flavio Fenton and a team of researchers have used an optical mapping system to observe exactly how the drug creates serious disturbances in the electrical signals that govern heartbeat. Related coverage: Research Horizons, ScienceDaily, Futurity, The Doctor's Channel, Cardiac Rhythm News.

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