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Intraplaque hemorrhage: its significance in cerebrovascular disease
Insights
Intraplaque hemorrhage in carotid plaques is common, even in asymptomatic patients. Its presence alone does not solely cause specific neurologic symptoms, and its age poorly correlates with symptom timing.
Area of Science:
- Neurology
- Vascular Surgery
- Pathology
Background:
- Cerebrovascular symptoms are often linked to carotid plaque characteristics.
- Intraplaque hemorrhage (IPH) is a key factor under investigation for its role in stroke etiology.
- Understanding the relationship between IPH and neurological events is crucial for risk stratification.
Purpose of the Study:
- To investigate the prevalence of intraplaque hemorrhage in carotid endarterectomy specimens.
- To correlate the presence and age of IPH with specific neurologic symptoms, nonlateralizing symptoms, and asymptomatic patients.
- To evaluate the relationship between the timing of symptoms and the age of intraplaque hemorrhage.
Main Methods:
- Carotid plaques from 95 carotid endarterectomy procedures were analyzed.
- Histopathological examination was performed to detect and assess intraplaque hemorrhage.
- Patients were categorized into three groups: specific neurologic symptoms, nonlateralizing symptoms, and asymptomatic.
Main Results:
- Intraplaque hemorrhage was found in a high percentage of patients across all symptom groups, including asymptomatic individuals.
- A significant portion of patients with specific neurologic symptoms exhibited IPH.
- The age of intraplaque hemorrhage showed a poor correlation with the timing of neurological symptoms.
Conclusions:
- While intraplaque hemorrhage may contribute to cerebrovascular symptoms, its mere presence is not causative of specific neurologic events.
- The study refutes the notion that hemorrhage age directly correlates with symptom onset, challenging previous findings.
- IPH is a common finding in carotid plaques, irrespective of symptomatology, suggesting a complex role in cerebrovascular disease.
Abstract:
Recently, carotid plaque factors, specifically intraplaque hemorrhage, have been studied with respect to the production of cerebrovascular symptoms. Ninety-five carotid endarterectomies were performed and the plaques that were removed were examined for intraplaque hemorrhage. Patients were separated into three groups: those with specific neurologic symptoms, those with nonlateralizing symptoms, and those who were asymptomatic. In the group of patients who presented with specific neurologic symptoms, correlation was made between the age of the intraplaque hemorrhage and the timing of symptoms. The vast majority of patients with specific neurologic symptoms exhibited carotid plaque hemorrhage, but patients with nonlateralizing symptoms and those who were asymptomatic also demonstrated an unexpectedly high percentage of intraplaque hemorrhage. Moreover, our results show a poor relationship between the timing of symptoms and the age of the intraplaque hemorrhage. These data do not refute the concept that intraplaque hemorrhage may play a role in the production of cerebrovascular symptoms, but they do refute the notion that the mere presence of hemorrhage causes specific neurologic symptoms and they also refute the previous report that demonstrates a good correlation between the timing of symptoms and the age of the intraplaque hemorrhage.