Table 2

Vascular parameters of the study group

ParameterRheumatoid arthritis (n = 32)Control subjects (n = 28)p Value
Flow mediated vasodilatation, 100×((post-hyperaemia diameter−basal diameter)/basal diameter); brachial artery diameter, diameter of the brachial artery at the R wave of the electrocardiogram; basal brachial flow, basal arterial cross sectional area (π×r2) times mean Doppler velocity corrected for angle; post-hyperaemic flow, post-hyperaemic arterial cross sectional area (π×r2) times mean Doppler velocity corrected for angle.
Flow mediated vasodilatation (%)3.2 (1.3)5.7 (2.0)<0.001
Brachial artery diameter (mm)3.9 (0.6)3.8 (0.5)NS
Basal brachial flow (ml/min)120 (22)133 (38)NS
Post-hyperaemic flow (ml/min)290 (27)301 (33)NS