title: Electrocardiographic left atrial enlargement versus interatrial conduction defect.
mesh_terms: D006332:Cardiomegaly / Q000175:diagnosis*; D004452:Echocardiography; D004562:Electrocardiography; D006325:Heart Atria; D006329:Heart Conduction System; D006801:Humans; D014672:Vectorcardiography