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Patterns of fibrin deposits in carotid artery plaques
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Fibrin patterns in carotid endarterectomy (CEA) specimens were analyzed. Findings suggest standard medical treatments may have limitations for carotid artery disease, as fibrin was often absent from plaque surfaces.
Area of Science:
- Vascular Surgery
- Pathology
- Cardiovascular Research
Background:
- Carotid endarterectomy (CEA) is a procedure to remove plaque from carotid arteries.
- Intraplaque hemorrhage is a risk factor for cerebrovascular events.
- Fibrin presence at the plaque surface may indicate thrombotic activity.
Purpose of the Study:
- To evaluate fibrin distribution patterns on carotid endarterectomy specimens.
- To correlate fibrin patterns with clinical presentation and medical treatment.
- To assess implications for carotid artery disease management.
Main Methods:
- Analysis of 40 consecutive carotid endarterectomy specimens.
- Histological examination for fibrin and intraplaque hemorrhage.
- Classification of fibrin distribution into two types (Type I and Type II).
- Correlation with clinical data including ischemic symptoms and medication use.
Main Results:
- Intraplaque hemorrhage was present in 93% of specimens.
- Type I fibrin (lumen thrombus) found in 7 specimens; Type II (intraplaque hemorrhage at lumen surface) in 15 specimens.
- No significant association between fibrin patterns and ischemic symptoms or antiplatelet/anticoagulant use.
- All Type I specimens showed ≥70% diameter stenosis.
Conclusions:
- Fibrin patterns in carotid plaques are diverse.
- The frequent absence of fibrin at plaque surfaces may indicate limitations of current medical therapies for carotid artery disease.
- Further research is needed to optimize treatment strategies for preventing stroke in patients with carotid artery disease.
Abstract:
We evaluated 40 consecutive carotid endarterectomy specimens for the presence of fibrin. Intraplaque hemorrhage was noted in 93% of specimens. At the plaque surface, there were two patterns of fibrin distribution. Type I, suggesting a lumen thrombus, was found in 7 specimens. Type II, suggesting an intraplaque hemorrhage at the lumen surface, was found in 15 specimens. These changes were not significantly associated with the presence of ischemic symptoms or the use of antiplatelet or anticoagulant medications. All specimens with Type I change had arteriographic evidence of at least 70% diameter stenosis. The frequent lack of fibrin at the plaque surface suggests that there may be inherent limitations of standard medical treatment for carotid artery disease.