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Role of transcranial Doppler in cerebral hyperperfusion syndrome
C W A Pennekamp1, F L Moll, G J De Borst
1Department of Vascular Surgery, University Medical Center Utrecht, Utrecht, The Netherlands.
Insights
Cerebral hyperperfusion syndrome (CHS) after carotid procedures is a serious risk. Transcranial Doppler (TCD) shows promise for predicting CHS, but more research is needed to confirm its effectiveness in larger patient groups.
Area of Science:
- Neurology
- Vascular Surgery
- Medical Imaging
Background:
- Carotid revascularization procedures like CEA and CAS can lead to cerebrovascular complications.
- Cerebral hyperperfusion syndrome (CHS) is a significant risk, affecting approximately 3% of patients post-procedure.
- Early identification of patients at risk for CHS is crucial for reducing morbidity and mortality.
Purpose of the Study:
- To evaluate the diagnostic value of Transcranial Doppler (TCD) in predicting Cerebral Hyperperfusion Syndrome (CHS).
- To assess the applicability of TCD findings across different carotid revascularization techniques (CEA and CAS).
Main Methods:
- Utilized Transcranial Doppler (TCD) for cerebral blood flow measurement.
- Defined CHS based on a >100% increase in cerebral blood flow over baseline via TCD.
- Reviewed existing studies on TCD's role in CHS prediction following CEA and CAS.
Main Results:
- TCD is currently the primary clinical tool for CHS monitoring and prediction.
- Previous studies show promising results for TCD in CHS prediction but were limited by small sample sizes and varied CHS definitions.
- Most research on TCD and CHS has focused on carotid endarterectomy (CEA), with limited data for carotid angioplasty with stenting (CAS).
Conclusions:
- Further large-scale studies are required to validate TCD's predictive value for CHS.
- Additional research is needed to determine if TCD findings in CEA patients can be generalized to CAS patients.
- Comprehensive assessment of cerebral hemodynamic changes using TCD in both CEA and CAS is necessary.
Abstract:
The benefit of carotid revascularization is hampered by occurrence of periprocedural cerebrovascular complications. Cerebral hyperperfusion syndrome (CHS) is a potentially life threatening complication occurring in approximately 3% of all patients following either carotid endarterectomy (CEA) or carotid angioplasty with stenting (CAS). CHS generally is defined as a transcranial Doppler (TCD) derived increase in cerebral blood flow of >100% over baseline. To reduce related morbidity and mortality early identification of patients at risk is essential. As such, TCD offers a technique for cerebral blood flow measurement that is nowadays the only applied and useful clinical monitoring tool for CHS prediction. Several studies have assessed the diagnostic value of TCD in the prediction of CHS and found promising results. However, results were based on a small number of cases and different definitions have been used to diagnose CHS. Moreover, the role of TCD in the onset of CHS has been studied most extensively following CEA, and it is unclear whether the findings of these studies can be generalized to patients undergoing CAS. Therefore we conclude that further studies in larger cohorts are required to assess the changes in cerebral hemodynamic in patients undergoing either CAS or CEA.
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