title: Electrocardiogram of the month. Atrial fibrillation or flutter-fibrillation.
mesh_terms: D000368:Aged; D001281:Atrial Fibrillation / Q000150:complications / Q000175:diagnosis* / Q000628:therapy; D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000150:complications; D006801:Humans; D010138:Pacemaker, Artificial; D012804:Sick Sinus Syndrome / Q000150:complications