Related Experiment Video
Updated: Mar 5, 2026
Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
Published on: July 20, 2022
The Relationship Between Serum Bilirubin Concentration and Atrial Fibrillation
Mehmet Demir1, Canan Demir2, Umut Uyan1
1Cardiology Department, Bursa Yuksek Ihtisas Education and Research Hospital, Bursa, Turkey.
Insights
Lower serum bilirubin levels are linked to nonvalvular atrial fibrillation (AF). This study found significantly reduced total, direct, and indirect bilirubin in AF patients compared to controls, suggesting a potential biomarker role.
Area of Science:
- Biochemistry
- Cardiology
- Clinical Medicine
Background:
- Higher serum bilirubin is known to inhibit vascular smooth muscle cell inflammation and proliferation.
- Existing research links serum bilirubin to cardiovascular disease, but its association with atrial fibrillation (AF) remains unclear.
Purpose of the Study:
- To investigate the relationship between serum bilirubin levels and nonvalvular atrial fibrillation (AF).
- To compare serum bilirubin concentrations in patients with nonvalvular AF against a control group.
Main Methods:
- Inclusion of 102 patients diagnosed with nonvalvular chronic AF and 100 age-matched healthy individuals in sinus rhythm.
- Measurement of routine biochemical parameters and serum bilirubin levels (total, direct, and indirect) in both groups.
Main Results:
- No significant differences in basic demographic characteristics were observed between the AF and control groups.
- Significantly lower levels of total, direct, and indirect serum bilirubin were found in patients with nonvalvular AF compared to the control group (P < 0.001 for all).
Conclusions:
- The study establishes a significant relationship between serum bilirubin levels and nonvalvular AF.
- Lower serum bilirubin may be associated with the presence of nonvalvular AF, warranting further investigation.
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.
Materials And Method:
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).
Conclusion:
As a result, our study revealed a relationship between serum bilirubin and nonvalvular AF.
Related Concept Videos
01:25ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
01:22Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test
01:24Serum Studies: Renal Function Tests
01:29Disturbances in Heart Rhythm
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
01:18Dysrhythmias IV: Characteristics of Bradyarrhythmias
02:45Blood Transfusion and Agglutination
History
The history of blood transfusion dates back to the 17th century, when early attempts were made in animals. In 1818 James Blundell, a British doctor, performed the first successful human blood transfusion. Later in 1900, Karl...