Dangerous connection between rheumatoid arthritis, heart disease

In one study, Mayo researchers discovered that patients whose rheumatoid arthritis is more severe are likelier to have heart problems. That becomes true soon after rheumatoid arthritis strikes, making early treatment of rheumatoid arthritis important, says co-author Eric Matteson, M.D., chair of rheumatology at Mayo Clinic in Rochester, Minn.

"One thing that we learned in particular in this study is that the high disease burden on the joints in the first year of disease already is a very strong predictor of cardiovascular disease subsequently, and that seems to be mitigated as time goes on if the disease burden can be reduced too," Dr. Matteson says.

In other research, a Mayo team looked at a common virus called cytomegalovirus, a bug many people get and do not even know they have. They found correlations between rheumatoid arthritis patients' immune response to the virus and the development of myocardial disease.

If it turns out that there is this relationship, then it may be that one way to spot patients who are at higher risk for heart disease would be an immune profile or biomarkers related to the cytomegalovirus and its associated immune activation signaling," says Dr. Matteson, a co-author.

Another study found that women with rheumatoid arthritis and early menopause -- menopause before age 45 -- also seem to be at higher risk of heart disease. About two-thirds of patients with rheumatoid arthritis are women, and researchers have long studied possible hormonal influences on development of the disease, Dr. Matteson says.

"This study shows the complex relationship between rheumatoid arthritis, hormones and heart disease," says Dr. Matteson, the senior author. "We also found patients who have had multiple children, especially seven or more, are at higher risk of cardiovascular disease compared with women who have menopause at a normal age or have fewer children."