title: RETRACTED: Syncope in adults with pulmonary arterial hypertension.
abstract: This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).
  
  This article has been retracted at the request of the authors, because of a data entry error which is fundamental to the study findings.
  
  As background, this was a clinical study where a specific variable was tested in a large database.
  
  The process involved merging a variable (presence or absence of syncope) from one electronic source with an alternate electronic database of patients with pulmonary arterial hypertension and assessing associations and outcomes. In proceeding to design a follow-up study to this work Dr. Le, went back to the original source file to abstract new data. In doing this she identified a 'cut-and paste' error in which the column of syncope data was transferred incorrectly where syncope/no syncope variables were assigned to wrong subjects. This led to a critical error that then got carried forward and a fundamental misclassification of syncope in the final study group. This error fundamentally affects the results which now do not fully support the conclusions.
authors.affiliation: Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA.
authors.forename: Rachel J
authors.initials: RJ
authors.lastname: Le
authors.forename: Eric R
authors.initials: ER
authors.lastname: Fenstad
authors.forename: Hilal
authors.initials: H
authors.lastname: Maradit-Kremers
authors.forename: Robert B
authors.initials: RB
authors.lastname: McCully
authors.forename: Robert P
authors.initials: RP
authors.lastname: Frantz
authors.forename: Michael D
authors.initials: MD
authors.lastname: McGoon
authors.forename: Garvan C
authors.initials: GC
authors.lastname: Kane
mesh_terms: D016280:Atrial Function, Right / Q000502:physiology; D002302:Cardiac Output / Q000502:physiology; D015331:Cohort Studies; D005260:Female; D006801:Humans; D006976:Hypertension, Pulmonary / Q000401:mortality* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D016016:Proportional Hazards Models; D013575:Syncope / Q000401:mortality* / Q000503:physiopathology