Screening of silent myocardial ischaemia using a stress test in rheumatoid arthritis patients: Association with traditional risk factors and disease activity

Introduction: We aimed to screen the presence of silent myocardial ischaemia, in established rheumatoid arthritis (RA) patients, using a stress test then to evaluate its association with the disease activity and the cardiovascular (CV) risk factors and Heartscore. Methods: It is a transversal study in a rheumatologic centre in Tunisia. One hundred three RA patients, asymptomatic for CV diseases, were submitted to a stress test. Demographic data, CV risk factors and disease characteristics were assessed and risk factors of silent myocardial ischaemia in RA patients were identified. Results: There were 103 patients (sex-ratio = 0.3) with a mean age of 53 +/- 10 years. The evaluation of the disease activity showed that the mean Disease Activity Score in 28 joints C-reactive protein, Clinical Disease Activity Index and Simplified Disease Activity Index were 3.9 +/- 1.38, 17.17 +/- 11.4 and 33.39 +/- 26, respectively. The ischaemic ratio (CT/HDL) revealed that 42% of patients had a moderate to high myocardial ischaemic risk. HeartSCORE was high in 35% of cases. A silent myocardial ischaemia in the stress test was found in 11 patients (10.6%) and was associated with male sex (p = 0.03), advanced age (p = 0.04), erosive character (p = 0.05), the advanced age of the RA diagnosis (p = 0.01) and the ischaemic ratio (p = 0.05). No relationship was found with the majority of traditional CV risk factors nor with disease activity variables. Conclusion: Our results corroborated the hypothesis that the stress test could reveal subclinical CV dysfunction and supported the utility of the Heartscore as a screening tool.