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Published on: April 1, 2015
Fibrinogen: associations with cardiovascular events in an outpatient clinic
Monica Acevedo1, JoAnne Micale Foody, Gregory L Pearce
1Department of Cardiology, Section of Preventive Cardiology and Cardiac Rehabilitation, The Cleveland Clinic Foundation, Cleveland, Ohio 44195, USA.
Insights
Elevated fibrinogen levels are linked to myocardial infarction (MI) and predict short-term mortality in patients. This study highlights fibrinogen
Area of Science:
- Cardiology
- Biochemistry
- Clinical Medicine
Background:
- Fibrinogen influences coagulation and is an independent risk factor for coronary artery disease (CAD).
- The association of fibrinogen with myocardial infarction (MI) and its predictive value for short-term mortality in clinical practice remained uncharacterized.
Purpose of the Study:
- To determine if baseline fibrinogen levels are associated with MI, not just CAD.
- To assess if baseline fibrinogen levels predict short-term mortality in a high-risk outpatient setting.
Main Methods:
- Logistic regression models were used to analyze data from 2126 patients with baseline fibrinogen measurements.
- The study evaluated the association of fibrinogen with CAD and MI, adjusting for the Framingham risk score.
- Mortality prediction was assessed over a mean follow-up of 24 months.
Main Results:
- Fibrinogen levels significantly correlated with the presence of CAD and a history of MI (adjusted OR = 1.25, P =.001).
- Fibrinogen showed a significant association with CAD only when MI was included in the analysis.
- Higher fibrinogen quartiles demonstrated a graded, independent relationship with mortality (hazard ratio = 1.81, P <.001).
Conclusions:
- Fibrinogen is directly associated with MI in an outpatient clinical setting.
- Baseline fibrinogen levels serve as an independent predictor of short-term mortality.
Background:
Fibrinogen, known to influence the coagulation process, is an independent risk factor for coronary artery disease (CAD). However, its association with myocardial infarction (MI) and its predictive potential for short-term mortality, in an ongoing clinical practice, has not been characterized.
Objectives:
In a high-risk outpatient practice we sought to demonstrate whether baseline fibrinogen levels related to MI rather than CAD alone, and whether baseline serum fibrinogen levels predicted mortality over a short-term follow-up.
Methods And Results:
From a total of 2126 patients with baseline fibrinogen measurements (mean age, 56 +/- 12 years, 35% female), 1187 patients with CAD (n = 606 with MI) and 939 patients without CAD were evaluated in an active preventive cardiology unit of a large city hospital. Logistic regression models were used to determine the association of fibrinogen with differing CAD presentations. Fibrinogen quartile showed a significant correlation with CAD both univariately and after adjustment for Framingham risk score (odds ratio [OR] = 1.22, P <.001). Fibrinogen levels were significantly associated with the presence of CAD and history of MI (adjusted OR = 1.25, P =.001). Fibrinogen did not show a significant association to CAD when MI was not considered in the analysis (OR = 1.01, P =.82). In this same clinical cohort, after a mean follow-up of 24 +/- 13 months, 41 patients had died. Consistent with the observed association with MI, fibrinogen quartile showed a graded independent relation to mortality in a cohort of both men and women (hazard ratio = 1.81, P <.001).
Conclusions:
In the clinical setting of an outpatient clinic, fibrinogen was directly associated with the presence of MI and was revealed to be an independent short-term predictor of mortality.
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