Summary
During the past decade, the role of inflammation in the pathophysiology of arterial
thrombosis has been elucidated. However, comparatively little is known about the relationship
between inflammation and venous thrombosis. The aim of this study was to perform a
systematic review of clinical studies that have examined the association between inflammation
and venous thrombosis, specifically: (1) the value of inflammatory markers in predicting
the future development of venous thrombosis; (2) test characteristics of markers of
inflammation in the diagnosis of acute venous thrombosis; and (3) effect of venous
thrombosis on blood levels of inflammatory markers. Using keywords venous thrombosis,
venous thromboembolism, inflammation, acute phase markers, C-reactive protein (CRP),
interleukin (IL)-6, IL-8, and monocyte chemotactic protein (MCP)-1, PubMed and Medline
computerized databases were searched for English language articles published after
1980. Search results were restricted to clinical studies in humans that used study
designs that were appropriate to address the above objectives. Results show that plasma
CRP levels do not appear to predict risk
of future venous thtwo (rombosis studies; N=41,308). Four studies (N=562) have examined
the utility of plasma CRP in the diagnosis of venous thrombosis; pooled positive and
negative predictive values were 53% (95% CI:47%,59%) and 85% (95% CI: 81%, 89%), respectively.A
two- to six-fold increase in the risk of deep vein thrombosis (DVT) is associated
with elevations in plasma levels of CRP, IL-6, IL-8, MCP-1 orTNF-α (three studies).
We can conclude that the nature of the relationship between inflammation and clinical
venous thrombosis is not yet established. CRP does not appear to be useful in predicting
future venous thrombosis or in the diagnosis of acute venous thrombosis. While several
markers of inflammation are elevated in acute venous thrombosis, further research
is needed to determine the precise relationship between these markers and venous thrombosis.
The identification and elucidation of inflammatory markers relevant to venous thrombosis
could provide targets for future therapy.
Keywords
Venous thromboembolism - markers of inflammation - prognosis - predictors - pathophysiology