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- W2023008854 abstract "T HE occurrence of bright-red blood (rather than blue or bluish-red blood) in surface veins of the cerebral cortex of man and animals is a striking phenomenon, although it may be overlooked by an unsuspecting or inattentive observer. Red venous blood (RVB) has been seen flowing from normal or abnormal cerebral tissue in a number of situations. Abnormal vessels that pass arterial blood directly into venous channels, such as the shunts that occur in arteriovenous malformations and tumors, frequently are associated with bright-red venous blood2 RVB has been seen during and after seizures, whether spontaneous or induced by electrical stimulation u or chemical stimulation. 13 When cerebral ischemia is relieved, as after the release o f a temporary clamp from a cerebral artery in animal studies or during surgery for aneurysms in humans, generalized or focal RVB may develop 16 (Feindel, W., unpublished observations; Sundt, T. M., Jr., unpublished observations). Generalized reddening of cerebral venous blood may occur after the restoration of flow of adequately oxygenated blood following cardiac arrest or after clamping the great vessels or the trachea. 1' RVB has been noted in human cerebral cortex in veins draining cystic or scarred areas, 3,H presumably related to earlier cerebral infarction. In addition, RVB has been seen in animals in regions of brain made ischemic by occlusion of a middle cerebral artery. '9 Systemic hypoglycemia, produced by injecting insulin, may cause RVB to develop in ischemic cortex of animals. '~ Because of the implication that venous oxygen saturation is greater than usual, the occurrence of bright-red blood in veins draining ischemic tissue is surprising. In this paper, data about red cerebral venous" @default.
- W2023008854 created "2016-06-24" @default.
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- W2023008854 date "1969-08-01" @default.
- W2023008854 modified "2023-09-27" @default.
- W2023008854 title "Red Venous Blood: Occurrence and Significance in Ischemic and Nonischemic Cerebral Cortex" @default.
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- W2023008854 doi "https://doi.org/10.3171/jns.1969.31.2.0141" @default.
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