LONDON – Cardiovascular disease (CVD) risk assessment for patients with rheumatic diseases can be simple and integrated into general practice or rheumatology clinics, experts said during an Outcomes Science Session at the European Congress of Rheumatology
Patients with rheumatoid arthritis have a 50% higher risk of heart disease than do their counterparts without the disease, but “just having RA on its own isn’t sufficient to render that individual at high risk,” Dr. Naveed Sattar, professor of metabolic medicine at the University of Glasgow’s Institute of Cardiovascular and Medical Sciences in Scotland, said in an interview.
Dr. Naveed Sattar
It’s simple enough to use traditional CVD risk factors in an RA population by including a patient’s age, gender, smoking status, and family history of heart disease, in addition to measuring blood pressure and blood lipid levels. Most risk scores will compile those features into a 10-year risk of a fatal CVD event. To account for the contribution of RA, Dr. Sattar said, simply multiply that score by 1.5.
While “there’s a fixation in some parts of Europe for [measuring] fasting lipids,” it is not necessary, Dr. Sattar said. The two lipid parameters that go in risk scores tend to be cholesterol and HDL cholesterol, he said, which change only minimally in fasting versus nonfasting states.
“The evidence overwhelmingly shows that nonfasting lipids, which can be done easily on the same sample as other clinic tests, are just as predictive of CVD risk as fasting lipids,” he said. “That really matters because many of our patients with RA or other conditions come to the hospital when they’re not fasting, and we shouldn’t be sending them away to come back fasting to do risk scores for CVD. That just doesn’t make sense.”
Updated guidelines from the European Society of Cardiology and guidelines soon to be released from the European League Against Rheumatism suggest that risk scores can be calculated every 5 years for most patients, a change from previous recommendations to calculate risk annually. Risk scoring is not perfect, however, and there is some debate about whether additional blood tests or ultrasound scanning of the carotid artery could augment the ability to predict heart disease risk. “We’re not quite there yet,” Dr. Sattar said. “I think we should do the simple things first and do them well.”
CV risk raised in all inflammatory arthritic diseases
During the same session, Dr. Paola de Pablo of the University of Birmingham, England, focused on how immune-mediated diseases predispose to premature, accelerated atherosclerosis and subsequent increased cardiovascular morbidity and mortality.
Cardiovascular risk is not only elevated in those with RA, she observed, but also in those with systemic lupus erythematosus, ankylosing spondylitis, psoriatic arthritis, vasculitides, and inflammatory myopathies. The risk varies but as a rule is more than 50% higher than the rate seen in the general population.
The underlying mechanisms are not clear, but chronic inflammation is closely linked with atherosclerosis, which in turn ups the risk for myocardial infarction and cerebrovascular accident.
Despite treatment, the risk often remains, Dr. de Pablo said. She highlighted how treatment with methotrexate and anti–tumor necrosis factor (TNF)–alpha drugs in RA had been associated with a reduction in the risk for heart attack of 20% and 40%, respectively (Ann Rheum Dis. 2014;74:480–89) so targeting inflammation with these drugs may have positive effects, at least in RA.
Managing traditional cardiovascular risk factors remains important, Dr. de Pablo said. That was a sentiment echoed by Dr. Sattar and by rheumatologist Dr. Michael Nurmohamed of the VU Medical Center in Amsterdam. This includes controlling blood pressure with antihypertensive medications and blood lipids with statins, and advocating smoking cessation and perhaps other appropriate lifestyle changes such as increasing physical exercise and controlling weight.
Dr. Nurmohamed, who was involved in the 2015 update of the EULAR recommendations on cardiovascular risk management, noted that traditional risk factor management in patients with arthritis in current clinical practice is often poor and that strategies to address this were urgently needed.
Although treating to-target and preventing disease flares in the rheumatic diseases is important, it lowers but does not normalize cardiovascular risk. “This appears to be irrespective of the drug used,” Dr. Nurmohamed said. Rheumatologists need to be careful when tapering medication, particularly the biologics, as these are perhaps helping to temper cardiovascular inflammation, which could worsen when doses are reduced. “Antirheumatic treatment only is not good enough to decrease or normalize the cardiovascular risk of our patients”, he emphasized.
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