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In a recent paper the authors1 discussed the findings of postoperative angiography carried out routinely on patients with ruptured intracranial aneurysms. It was felt that arterial spasm was one of the chief reasons for postoperative morbidity and mortality, and in this paper the problem is considered further with regard to cause and effect. Attention is given also to earlier manifestations of arterial spasm, whether operation was undertaken or not.
It has been suggested that vasospasm is an optical illusion. However, when a vessel, previously shown to be of normal calibre, later appears thread-like in two or
BotterellE. H.LougheedW. M.ScottJ. W.VandewaterS. L.Hypothermia, and interruption of carotid, or carotid and vertebral circulation, in the surgical management of intracranial aneurysms.J. Neurosurg.195613: 1–42.BotterellLougheedScottVandewaterJ. Neurosurg.13: 1–42.
KruegerT. P.RockoffS. D.ThomasL. J.OmmayaA. K.The effect of changes of end expiratory carbon dioxide tension on the normal cerebral angiogram.Amer. J. Roentgenol.196390: 506–511.KruegerRockoffThomasOmmayaAmer. J. Roentgenol.90: 506–511.