Left atrial aneurysm.
D000783:Aneurysm / Q000175:diagnosis*; D001145:Arrhythmias, Cardiac; D006332:Cardiomegaly; D002648:Child; D004562:Electrocardiography; D005260:Female; D006325:Heart Atria; D006331:Heart Diseases / Q000175:diagnosis*; D006352:Heart Ventricles; D006801:Humans; D013902:Radiography, Thoracic