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Pulse Wave Velocity Testing in the Baltimore Longitudinal Study of Aging
Published on: February 7, 2014
Investigation of the aortic pulse wave velocity in patients with Gilbert's syndrome
Erol Arslan1, Mustafa Çakar, Hakan Şarlak
1Department of Internal Medicine, Gulhane Military Medical Academy , Ankara , Turkey.
Insights
Patients with Gilbert's syndrome exhibit lower arterial stiffness, measured by pulse wave velocity (PWV). Higher bilirubin levels in these patients correlate with reduced PWV, suggesting potential cardiovascular benefits.
Area of Science:
- Cardiovascular Medicine
- Hepatology
- Genetics
Background:
- Arterial stiffness, measured by aortic pulse wave velocity (PWV), is a key cardiovascular risk predictor.
- Gilbert's syndrome is a genetic liver disorder causing elevated bilirubin, inversely linked to cardiovascular events.
Purpose of the Study:
- To investigate serum bilirubin levels and arterial stiffness in Gilbert's syndrome patients.
- To explore the relationship between bilirubin and cardiovascular parameters in this cohort.
Main Methods:
- Compared PWV and serum bilirubin levels in 26 Gilbert's syndrome patients and 27 healthy controls.
- Recorded routine blood chemistry and arterial stiffness measurements.
Main Results:
- Gilbert's syndrome patients showed significantly lower PWV (6.68 m/s) than controls (7.3 m/s).
- PWV correlated inversely with total and indirect bilirubin levels in Gilbert's syndrome patients (r = -0.370, P = .009; r = -0.495, P = .003).
Conclusions:
- Gilbert's syndrome is associated with reduced arterial stiffness (lower PWV).
- Bilirubin levels are linked to arterial stiffness in these patients.
- Findings suggest a potential protective effect against atherosclerosis in Gilbert's syndrome.
Abstract:
Arterial stiffness is currently the "gold standard" measure of aortic (carotid-femoral) pulse wave velocity (PWV), which is an important independent predictor of risk of developing a cardiovascular event. Gilbert's syndrome is a congenital disorder characterized by intermittent and non-hemolytic elevation of indirect bilirubin levels due to the deficiency of the enzyme UDP-glucuronyl transferase in the liver and many prospective studies found an inverse relationship between bilirubin levels and cardiovascular events in these patients. We aimed to investigate serum bilirubin levels and arterial stiffness parameters in patients with Gilbert's syndrome in this study. A total of 53 cases, consisting of 26 patients with a diagnosis of Gilbert's syndrome and 27 healthy control subjects, were included in the study. Serum bilirubin levels, other routine blood chemistry, and arterial stiffness measurements were recorded. The mean ages of Gilbert's syndrome and the control group were 31.5 ± 9.7 and 36.8 ± 11.1 years, respectively. PWV measurements were significantly lower in Gilbert syndrome patients (6.68 and 7.3 m/s in patients and controls; respectively) (P < .05). In correlation analysis in Gilbert's syndrome patients, PWV had a significant correlation with total and indirect bilirubin levels (r = -0.370, P = .009/r = -0.495, P = .003, respectively). Gilbert's syndrome patients have lower PWV measurements compared to healthy subjects, and the total and indirect bilirubin levels are also associated with PWV measurements. These findings may indicate the decreased atherosclerotic disease incidence in Gilbert's syndrome patients.
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