title: Unveiling electrocardiographic mysteries.
authors.forename: Paulo Roberto Benchimol
authors.initials: PR
authors.lastname: Barbosa
mesh_terms: D000369:Aged, 80 and over; D002037:Bundle-Branch Block / Q000175:diagnosis* / Q000209:etiology; D004562:Electrocardiography; D005260:Female; D006801:Humans; D006947:Hyperkalemia / Q000150:complications*