title: Hydatid cyst of interventricular septum causing left anterior hemiblock.
mesh_terms: D002037:Bundle-Branch Block / Q000209:etiology; D002648:Child; D004443:Echinococcosis / Q000150:complications*; D004562:Electrocardiography; D006327:Heart Block / Q000209:etiology*; D006346:Heart Septum; D006801:Humans; D008297:Male; D011666:Pulmonary Valve Stenosis / Q000209:etiology