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Delayed cerebral ischaemia: The pathological substrate

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Summary

Ischaemic complications both at the level of the cortex and the hypothalamus are well recognised after an aneurysmal subarachnoid haemorrhage. We have studied histological changes in the cortex (53 patients) and hypothalamus (48 patients) in patients who died after an aneurysmal subarachnoid haemorrhage.

Cortical ischaemic lesions were demonstrated in 41 of the 53 patients studied. These changes were more common in patients who had impaired control of systemic blood pressure (p=0.0004) and in patients who died gradually (p=0.0003). Hypothalamic lesions were found in 24 of 48 patients studied; 23 of these patients had widespread associated changes in the cerebral cortex. Patients with moderate/severe cortical changes tended to have hypothalamic lesions and it was uncommon for patients with no cortical lesions to have changes in the hypothalamus (p=0.0007).

We believe that these histological changes are due to a diffuse microangiopathy which develops slowly after a subarachnoid haemorrhage and affects the cortex and hypothalamus. Because the cortical lesions are widespread we postulate that they may be implicated in the aetiology of the well described psychosocial or cognitive problems in patients who survive a subarachnoid haemorrhage.

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Authors and Affiliations

  1. Department of Neurosurgery, Southampton University Hospitals, London, UK

    G. Neil-Dwyer M.S., F.R.C.S., D. A. Lang & Ch. J. Gerber

  2. Department of Neuropathology, The Brook Hospital, London, UK

    B. Doshi

  3. Department of Social Statistics, Southampton University Hospitals, London, UK

    P. W. F. Smith

Authors
  1. G. Neil-Dwyer M.S., F.R.C.S.
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  2. D. A. Lang
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  3. B. Doshi
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  4. Ch. J. Gerber
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  5. P. W. F. Smith
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Neil-Dwyer, G., Lang, D.A., Doshi, B. et al. Delayed cerebral ischaemia: The pathological substrate. Acta neurochir 131, 137–145 (1994). https://doi.org/10.1007/BF01401464

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