title: The Relationship Between Serum Bilirubin Concentration and Atrial Fibrillation.
abstract: BACKGROUND
  Several studies have demonstrated that higher serum bilirubin inhibits the inflammation and proliferation of vascular smooth muscle cells; also there is a relationship between serum bilirubin and cardiovascular disease. However, the relationship between bilirubin and atrial fibrillation (AF) is still unknown. In our study, we compared serum bilirubin, between nonvalvular AF patients and controls.
  
  
  METHODS
  One hundred and two patients with nonvalvular chronic AF without any other cardiovascular disease (mean age 62.51 ± 5.88) were included in our study. One hundred age-matched healthy people with sinus rhythm were accepted as control groups (mean age 61.35 ± 5.44). Routine biochemical parameters and serum bilirubin levels were performed.
  
  
  RESULTS
  No statistically significant difference was found between two groups in terms of basic characteristics. Total, direct and indirect serum bilirubin levels were significantly lower among persons with AF compared to controls (0.82 ± 0.8 vs. 0.48 ± 0.5, 0.30 ± 0.2 vs. 0.19 ± 0.1 and 0.52 ± 0.5 vs. 0.29 ± 0.3 mg/dL; all P < 0.001, respectively).
  
  
  CONCLUSIONS
  As a result, our study revealed a relationship between serum bilirubin and nonvalvular AF.
authors.affiliation: Cardiology Department, Bursa Yuksek Ihtisas Education and Research Hospital, Bursa, Turkey.
authors.forename: Mehmet
authors.initials: M
authors.lastname: Demir
authors.affiliation: Infectious Disease Department, Bursa Sevket Yilmaz Education and Research Hospital, Bursa, Turkey.
authors.forename: Canan
authors.initials: C
authors.lastname: Demir
authors.affiliation: Cardiology Department, Bursa Yuksek Ihtisas Education and Research Hospital, Bursa, Turkey.
authors.forename: Umut
authors.initials: U
authors.lastname: Uyan
authors.affiliation: Cardiology Department, Bursa Yuksek Ihtisas Education and Research Hospital, Bursa, Turkey.
authors.forename: Mehmet
authors.initials: M
authors.lastname: Melek
keywords: Arrhytmia; Atrial fibrillation; Bilirubin; Endotel dysfunction; Inflammation