title: Viral studies in patients presenting with "normal variant African ECG".
mesh_terms: D000349:Africa / Q000208:ethnology; D044383:Black People; D004562:Electrocardiography; D005060:Europe; D005080:Exercise Test; D006331:Heart Diseases / Q000175:diagnosis* / Q000209:etiology; D006801:Humans; D014777:Virus Diseases