title: What causes the pauses?
mesh_terms: D002036:Bundle of His / Q000503:physiopathology; D002037:Bundle-Branch Block / Q000175:diagnosis / Q000503:physiopathology; D004562:Electrocardiography; D006327:Heart Block / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D009626:Terminology as Topic