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Vasospasm With Subarachnoid Hemorrhage From Intracranial Aneurysm

Arch Surg. 1965;90(3):404-409. doi:10.1001/archsurg.1965.01320090082019.
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VASOSPASM accompanying aneurysm of the intracranial portion of the internal carotid artery or its branches or other cerebral vessels may complicate the clinical picture and also render surgical management of the aneurysm more difficult. It may occur whether or not the aneurysm has bled but is more common after subarachnoid hemorrhage from leakage or rupture of an aneurysm. A varied incidence between 6% and 30% has been reported (Pool et al). The occurrence of such vasospasm may produce more widespread neurological involvement than would ordinarily be expected from the localized lesion and thereby alter the clinical picture. Its occurrence in branches of the intracranial vessels not ordinarily associated with the location of the lesion may produce neurological signs which are misleading. Vasospasm may also interfere with the recognition of an intracranial aneurysm on an arteriogram because of its effect on the filling of the aneurysm by radiopaque material. Finally, the


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