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[Extracranial-intracranial arterial bypass in the management of symptomatic vasospasm]
Insights
Superficial temporal artery-middle cerebral artery bypass effectively treated symptomatic vasospasm after subarachnoid hemorrhage. This surgical intervention improved cerebral blood flow and neurological function, potentially reducing long-term disability.
Area of Science:
- Neurosurgery
- Cerebrovascular Surgery
- Neurology
Background:
- Subarachnoid hemorrhage frequently leads to delayed neurologic deterioration due to cerebral vasospasm.
- Vasospasm significantly contributes to morbidity and mortality following subarachnoid hemorrhage.
Observation:
- Superficial temporal artery-middle cerebral artery bypass was performed in three patients with symptomatic vasospasm.
- Neurologic improvement was observed in all patients within 24 hours post-procedure.
Findings:
- Cerebral blood flow in the affected middle cerebral artery territory increased from 40 to 49 ml/100 g/min post-bypass.
- Angiography showed donor vessel dilation during spasm, with caliber reduction as vasospasm resolved.
Implications:
- Superficial temporal artery-middle cerebral artery anastomosis can restore blood flow to ischemic brain regions.
- This surgical strategy may decrease mortality and disability associated with vasospasm after subarachnoid hemorrhage.
Abstract:
Delayed neurologic deterioration from vasospasm remains the greatest cause of morbidity and mortality following subarachnoid hemorrhage. The authors performed superficial temporal artery-middle cerebral artery bypass in three patients with symptomatic vasospasm and studied its effects on cerebral hemodynamics. All three patients responded neurologically to the bypass procedure within 24 hours. The average cerebral blood flow in the region supplied by the spastic middle cerebral artery increased from 40 ml/100 g/min to 49 ml/100 g/min after bypass. Angiography disclosed dilatation of donor vessels during the peak of spasm, followed by their decrease in caliber coincident with alleviation of vasospasm. The authors conclude that superficial temporal artery-middle cerebral artery anastomosis for the management of symptomatic vasospasm can increase blood flow in the ischemic region supplied by the spastic artery. This management strategy may lower the incidence of death and disability from vasospasm after subarachnoid hemorrhage.