OBJECTIVE: To evaluate the endothelial function in patients with rheumatoid arthritis by means of brachial artery flow-mediated vasodilation. MATERIALS AND METHODS: Sixty-eight patients, 32 with rheumatoid arthritis and 36 in the control group, underwent brachial artery flow-mediated dilatation (B-mode ultrasound for evaluating cardiovascular risk). Afterwards, the correlation among brachial artery flow-mediated vasodilation, C-reactive protein, and disease duration in patients with rheumatoid arthritis was evaluated. RESULTS: The brachial artery flow-mediated dilatation of the brachial artery in rheumatoid arthritis corresponded to 5.6 ± 9.69%, and in the control group, to 23.24 ± 5.65%, with a statistically significant difference (p < 0.00001). C-reactive protein result was 4.8 ± 9.1 mg/l. The correlation among age, brachial artery flow-mediated dilatation, and C-reactive protein in patients with rheumatoid arthritis has not shown a statistically significant result. CONCLUSION: Women with rheumatoid arthritis present a significant endothelial dysfunction when compared with normal women.

Keywords: Rheumatoid arthritis, Endothelial dysfunction, Brachial artery flow-mediated dilatation