title: Mystery tracings: low cardiac output.
mesh_terms: D001919:Bradycardia / Q000175:diagnosis / Q000628:therapy; D002303:Cardiac Output, Low / Q000175:diagnosis*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis; D010138:Pacemaker, Artificial