A systematic review analyses the results of 177 trials conducted between 1982 and 2016, including 18,436 patients who underwent electrocardiographic evaluation during malaria clinical trials. Nick White and colleagues found that serious cardiovascular side effects, which include sudden cardiac death, are very rare in the treatment of malaria with quinoline antimalarials. The work emphasises the importance of continued pharmacovigilance with the increasing use of quinoline antimalarials in mass treatment strategies such as intermittent preventative treatment and mass drug administration.