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Published on: May 9, 2013
[Cerebral hyperperfusion syndrome in carotid revascularisation surgery]
Marta Ballesteros-Pomar1, Gonzalo Alonso-Argüeso, Javier Tejada-García
1Servicio de Angiología, Cirugía Vascular y Endovascular, Hospital Universitario de León, Altos de Nava, s/n. E-24008 León, España. mballesterosp@telefonica.net
Insights
Cerebral hyperperfusion syndrome (CHS) is a serious complication after carotid revascularisation surgery. Early diagnosis and management, focusing on blood pressure control, are crucial to reduce its high morbidity and mortality rates.
Area of Science:
- Neurology
- Vascular Surgery
- Critical Care Medicine
Background:
- Cerebral hyperperfusion syndrome (CHS) is a significant complication following carotid revascularisation procedures, including endarterectomy and stenting.
- It involves a rapid increase in cerebral blood flow exceeding 100% of pre-operative levels.
- CHS can lead to severe outcomes such as brain edema, hemorrhage, and death if not promptly addressed.
Purpose of the Study:
- To conduct a comprehensive literature review on Cerebral Hyperperfusion Syndrome (CHS).
- To update current knowledge regarding the incidence, pathophysiology, clinical presentation, risk factors, diagnosis, and management of CHS.
- To provide a consolidated resource for specialists managing patients at risk of this complication.
Main Methods:
- Literature search of published studies on Cerebral Hyperperfusion Syndrome (CHS).
- Analysis of pathophysiological mechanisms, including cerebrovascular autoregulation and post-operative hypertension.
- Review of diagnostic criteria, risk factors, and treatment strategies, emphasizing prevention.
Main Results:
- CHS is characterized by headache, convulsions, and focal neurological deficits, accompanied by hypertension and absence of cerebral ischemia.
- Key risk factors include diminished hemodynamic reserve, post-operative hypertension, and prolonged hyperperfusion.
- Diagnosis relies on clinical suspicion supported by imaging like transcranial Doppler ultrasonography or SPECT.
Conclusions:
- Cerebral Hyperperfusion Syndrome (CHS) is an under-diagnosed yet serious complication of carotid revascularisation.
- Awareness and early diagnosis by specialists are essential for timely intervention.
- Strict control of arterial blood pressure is the cornerstone of CHS prevention and management, reducing associated morbidity and mortality.
Introduction:
Cerebral hyperperfusion syndrome (CHS) is a serious complication of carotid revascularisation surgery associated with both carotid endarterectomy and carotid stenting.
Aim:
To review the literature published to date on CHS with the aim of updating the data available on its incidence, pathophysiology, clinical features, risk factors, diagnosis, management and treatment.
Development:
Carotid revascularisation surgery entails a transient increase in cerebral blood flow, and if this increase is more than 100% of the pre-operative value, then hyperperfusion occurs. Two pathophysiological mechanisms are involved in increasing cerebral blood flow: alteration of the cerebrovascular autoregulation mechanisms and increased post-operative systolic arterial pressure. CHS consists in the clinical triad headache, convulsions and focal neurological deficit, associated with arterial hypertension and the absence of cerebral ischaemia. If left undiagnosed, as it progresses it will lead to brain oedema, brain or subarachnoid haemorrhage and, finally, death. The main risk factors for CHS are: diminished haemodynamic reserve, post-operative arterial hypertension and hyperperfusion, which remains for several hours after the carotid recanalisation. Diagnosis is based on clinical suspicion and complementary tests, such as trans-cranial Doppler ultrasonography or single-photon emission tomography, which confirm the suspected hyperperfusion. The keystone on which treatment is based is prevention by strict control of the arterial pressure with drugs such as labetalol and clonidine.
Conclusions:
CHS is a serious, under-diagnosed complication of carotid revascularisation that the specialist must be aware of so that treatment can be established at an early stage, thereby reducing its high morbidity and mortality rate.
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