title: Left bundle branch block.
mesh_terms: D002037:Bundle-Branch Block / Q000175:diagnosis* / Q000503:physiopathology / Q000628:therapy; D004562:Electrocardiography; D006346:Heart Septum / Q000503:physiopathology; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D013997:Time Factors