title: Atrial premature beats in the diagnosis of myocardial infarction with left bundle branch block.
mesh_terms: D002037:Bundle-Branch Block / Q000150:complications / Q000175:diagnosis*; D004562:Electrocardiography; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications / Q000175:diagnosis*