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Fibrinogen predicts mortality in high risk patients with peripheral artery disease
L Doweik1, T Maca, M Schillinger
1Department of Angiology, Medical School, University of Vienna, Vienna, Austria.
Insights
Elevated fibrinogen levels in patients with peripheral artery disease (PAD) significantly increase the risk of death, especially from cardiovascular causes. Monitoring fibrinogen can help predict outcomes in high-risk PAD patients.
Area of Science:
- Cardiovascular Medicine
- Hematology
- Atherosclerosis Research
Background:
- Fibrinogen is implicated in atherosclerosis and atherothrombotic disease complications.
- Peripheral artery disease (PAD) patients face significant mortality risks.
- Prognostic markers for PAD outcomes are crucial for clinical management.
Purpose of the Study:
- To investigate the prognostic impact of fibrinogen levels on mortality in high-risk patients with PAD.
- To determine if fibrinogen levels predict all-cause and cardiovascular mortality in PAD.
- To identify fibrinogen as a potential biomarker for PAD prognosis.
Main Methods:
- Study included 486 patients with PAD and cardiovascular comorbidities.
- Fibrinogen levels and atherosclerotic risk factors were measured at baseline.
- Patients were followed for a median of 7 years for mortality outcomes.
- Multivariate Cox regression analyzed fibrinogen quartiles' predictive value.
Main Results:
- Higher fibrinogen levels (10.2-12.2 and >12.2 micromol/l) were associated with significantly increased adjusted risk for all-cause mortality (HR 1.87 and 1.90).
- A similar effect was observed for cardiovascular mortality.
- Diabetes mellitus and critical limb ischemia were also independent predictors of mortality.
Conclusions:
- Elevated fibrinogen levels in high-risk PAD patients indicate a poorer prognosis.
- Fibrinogen is a significant predictor of fatal cardiovascular complications in PAD.
- Fibrinogen measurement may aid in risk stratification for PAD patients.
Objective:
Fibrinogen plays a key role in the pathogenesis of atherosclerosis and complications of atherothrombotic disease. We investigated the prognostic impact of fibrinogen levels on mortality of high risk patients with peripheral artery disease (PAD).
Methods:
We studied 486 patients with PAD and several cardiovascular comorbidities. Atherosclerotic risk factors and fibrinogen levels were determined at initial presentation and patients were followed for median 7 years (IQR 6-10) for all-cause and cardiovascular mortality. Multivariate Cox regression analysis was applied to assess the predictive value of fibrinogen levels (in quartiles) on patients' outcome.
Results:
Cumulative survival rates at 1, 3, 5 and 10 years were 96, 91, 83 and 67%, respectively. Overall, 138 patients (28%) died, 70% of these patients died of cardiovascular complications (n=96). Patients with fibrinogen levels 10.2-12.2 micromol/l (third quartile) and patients with fibrinogen levels above 12.2 micromol/l (fourth quartile) had a significantly increased adjusted risk for all-cause mortality (hazard ratios [HR] 1.87 and 1.90, p=0.025 and p=0.020, respectively) compared to patients in the lowest quartile (fibrinogen below 8.6 micromol/l). A consistent effect was observed for cardiovascular causes of death. Diabetes mellitus and critical limb ischemia were the only other independent predictor variables (HR 2.08, p<0.001 and 1.88, p=0.001, respectively).
Conclusion:
Elevated fibrinogen levels in high risk patients with PAD indicate an increased risk for poor outcome, particularly for fatal cardiovascular complications.
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