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Progression and Irreversibility in Brain Ischaemia

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Mechanisms of Secondary Brain Damage

Part of the book series: NATO ASI Series ((NSSA,volume 115))

Abstract

In recent years the twin concepts of thresholds of ischaemia and of the ischaemic penumbra have proved useful hypotheses in the investigation and management of cerebrovascular disease. This paper presents the current status of these concepts. The notion of an ischaemic threshold arose from clinical observation. It has long been clear in clinical neurosurgery, for example, that patients recovering from anaesthesia may show the progressive clearance of a neurological deficit, that some patients who develop a neurological deficit with lower blood pressure have that deficit promptly cleared when blood pressure is elevated and that patients with established cerebrovascular occlusion and dense neurological deficits may show quite evident improvement over months or years. While in this last example some of the potential for re-learned circuitry in the nervous system may play a part, it is clear that in more acute circumstances neurons which at one time are non-functioning, may under improved conditions of perfusion return to normal function.

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© 1986 Plenum Press, New York

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Symon, L. (1986). Progression and Irreversibility in Brain Ischaemia. In: Baethmann, A., Go, K.G., Unterberg, A. (eds) Mechanisms of Secondary Brain Damage. NATO ASI Series, vol 115. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-5203-7_17

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  • DOI: https://doi.org/10.1007/978-1-4684-5203-7_17

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4684-5205-1

  • Online ISBN: 978-1-4684-5203-7

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