Electrocardiogram of the month.
D000293:Adolescent; D003937:Diagnosis, Differential; D004562:Electrocardiography; D006801:Humans; D007008:Hypokalemia / Q000175:diagnosis / Q000209:etiology; D015473:Leukemia, Promyelocytic, Acute / Q000150:complications / Q000175:diagnosis; D008297:Male