title: EKG of the month. Arrhythmia.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000628:therapy; D001281:Atrial Fibrillation / Q000175:diagnosis; D002037:Bundle-Branch Block / Q000175:diagnosis; D003937:Diagnosis, Differential; D004562:Electrocardiography; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications / Q000601:surgery