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Analysis of Sympathetic Activity in Willis-Ekbom Disease — MIBG-RLS  

Restless Legs Syndrome Clinical Trial

Official title:
Analysis of Sympathetic Activity in Willis-Ekbom Disease

Clinical Trial Summary

Willis-Ekbom disease (WED), also known as restless legs syndrome (RLS) is a common neurological sensorimotor disorder that typically impairs sleep and quality of life, likely consequent to a central dopaminergic dysfunction associated to brain iron deficiency. Periodic limb movements (PLMS) in sleep are present in 80% of patients with WED. PLMS are often associated with micro-arousals that contribute to sleep fragmentation and repeated increases of blood pressure and heart rate throughout the night, thus representing an increased risk for hypertension and cardiovascular diseases (CVD). Willis-Ekbom disease affects people with higher cardiovascular risk factors, such as advanced age, obesity, diabetes mellitus and hypercholesterolemia. However, previous observational, cross-sectional or longitudinal population-based studies on the association between RLS and CVD and hypertension showed controversial results. While the pathophysiology of RLS is yet to be elucidated and is likely multifactorial, one theory involves a reduction in dopaminergic outflow to the preganglionic sympathetic neurons in the dorsal horn of the spinal cord. Dopamine inhibits preganglionic sympathetic neurons, therefore a reduction in dopamine may in turn increase sympathetic outflow. Based on this notion, the investigators hypothesize an increase of sympathetic autonomic activity in Willis-Ekbom disease responsible for the recurrent increase in blood pressure and heart rate during sleep, which may play a role in increasing the risk of cardiovascular diseases. The aim of this study is to analyze the autonomic nervous activity in patients with WED compared to healthy volunteers controls. The investigators will measure primarily the cardiac sympathetic activity by the 123I-metaiodobenzylguanidine (123I-MIBG) scintigraphy and secondarily the sympathetic nerve activity by the plasmatic pro inflammatory biomarkers and urinary catecholamine levels and the circadian variation of blood pressure and heart rate as assessed by the 24-hour ambulatory blood pressure monitoring.

Clinical Trial Description

n/a

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT02929732
Study type Interventional
Source University Hospital, Montpellier
Contact
Status Recruiting
Phase N/A
Start date March 21, 2017
Completion date October 5, 2025
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