title: Prognostic Significance of Right Bundle Branch Block for Patients with Acute Myocardial Infarction: A Systematic Review and Meta-Analysis.
abstract: BACKGROUND
  The aim of the current meta-analysis was to assess the effect of right bundle branch block (RBBB) on mortality outcome in patients with acute myocardial infarction (AMI).
  
  
  METHODS
  Embase, PubMed, and Cochrane databases were searched through January 2015 using the keywords "RBBB", "mortality", "AMI", "Coronary Heart Disease", and "cardiovascular". An odds ratio (OR) of RBBB on mortality endpoints was calculated using random-effects models.
  
  
  RESULTS
  RBBB was associated with significantly increased overall mortality in patients with AMI. The OR of RBBB for deaths was 1.56 [95% confidence interval (CI), 1.44 to 1.68, p<0.001]. Moreover, RBBB showed a considerable effect on both in-hospital mortality (OR: 1.94, 95% CI: 1.60 to 2.37, p=0.002) and long-term mortality (OR: 1.49, 95% CI: 1.37 to 1.62, p<0.001).
  
  
  CONCLUSIONS
  RBBB is associated with an increased risk of all-cause mortality and indicates a poorer prognosis in patients with AMI.
authors.affiliation: Department of Cardiology, The Second Affiliated Hospital, Soochow University, Suzhou, Jiangsu, China (mainland).
authors.forename: Li
authors.initials: L
authors.lastname: Xiang
authors.affiliation: Department of Respiration, The Second Affiliated Hospital, Soochow University, Suzhou, Jiangsu, China (mainland).
authors.forename: Anyuan
authors.initials: A
authors.lastname: Zhong
authors.affiliation: Department of Cardiology, The Second Affiliated Hospital, Soochow University, Suzhou, Jiangsu, China (mainland).
authors.forename: Tao
authors.initials: T
authors.lastname: You
authors.affiliation: Department of Cardiology, The Second Affiliated Hospital, Soochow University, Suzhou, Jiangsu, China (mainland).
authors.forename: Jianchang
authors.initials: J
authors.lastname: Chen
authors.affiliation: Department of Cardiology, The Second Affiliated Hospital, Soochow University, Suzhou, Jiangsu, China (mainland).
authors.forename: Weiting
authors.initials: W
authors.lastname: Xu
authors.affiliation: Department of Respiration, The Second Affiliated Hospital, Soochow University, Suzhou, Jiangsu, China (mainland).
authors.forename: Minhua
authors.initials: M
authors.lastname: Shi
mesh_terms: D002037:Bundle-Branch Block / Q000150:complications* / Q000401:mortality; D016001:Confidence Intervals; D006801:Humans; D009203:Myocardial Infarction / Q000150:complications* / Q000401:mortality; D011379:Prognosis; D017594:Publication Bias; D012307:Risk Factors