title: Prognosis in bundle branch block.
abstract: Chronic bundle branch block is common and is a marker for associated heart disease. In the asymptomatic patient no diagnostic studies or treatment are required. In the patient with symptoms suggestive of a bradyarrhythmia, attempts to document complete heart block should be made and if this rhythm is demonstrated a permanent pacemaker should be inserted. If no arrhythmia is documented, close clinical follow-up is warranted but insertion of a permanent pacemaker has not been shown to be useful in preventing symptoms or prolonging life.
mesh_terms: D002037:Bundle-Branch Block / Q000150:complications / Q000209:etiology / Q000503:physiopathology / Q000628:therapy*; D006801:Humans; D011379:Prognosis; D012306:Risk