Endothelial function in rheumatoid arthritis.

Area of Science:

• Cardiovascular Medicine
• Rheumatology
• Vascular Biology

Background:

• Rheumatoid arthritis (RA) is associated with an increased risk of accelerated atherosclerosis.
• Understanding the mechanistic pathways linking RA to cardiovascular disease is crucial for patient management.

Purpose of the Study:

• To evaluate endothelial dysfunction in RA patients.
• To identify endothelial dysfunction as a potential mechanistic link to the increased atherosclerosis observed in RA.

Main Methods:

• A prospective study involving 44 RA patients with active, long-standing disease (>12 months).
• Endothelial function assessed using the brachial artery method, measuring flow-mediated dilation (FMD%).
• Clustering analyses (hierarchical and k-means) were employed to group patients based on disease activity and FMD%.

Main Results:

• Only 13.6% of RA patients had normal endothelial function (normal FMD%).
• Clustering revealed significant differences in disease activity scores (DAS-28-ESR, DAS-28-CRP, CDAI, SDAI) and inflammatory markers (ESR, CRP) across patient clusters.
• Lower FMD% values correlated with higher disease activity and inflammation, indicating impaired endothelial function in most RA patients.

Conclusions:

• Endothelial dysfunction is prevalent in RA patients.
• Flow-mediated dilation (FMD%) can be utilized in clinical practice.
• Endothelial function assessment serves as a feasible early predictor of atherosclerosis in rheumatoid arthritis.