Monitoring Hemodynamic Changes Related to Vasospasm in the Circle of Willis After Aneurysm Surgery

  • A. Harders


In the last ten years the microneurosurgical treatment of ruptured cerebral aneurysm has become safer, with an operative mortality of 5–7% (Yaşargil 1984). The aim of early surgery within 72 hours after subarachnoid hemorrhage (SAH) is to prevent rebleeding and to be able to start a postoperative medical treatment for vasospasm with hypertonia and/or hypervolemia. The mortality is mainly due to delayed ischemic deficits (DID) with 27% due to vasospasm (Kassell 1984). Because the real cause of vasospasm is not yet known, all therapeutic measures are symptomolytic: either the perfusion pressure of the brain is increased (hypertonia) or the resistance is decreased by preventing the arterial walls from contracting (calcium channel blocker nimodipine) (Allen 1983).


Middle Cerebral Artery Hemodynamic Change Pulse Repetition Frequency Pericallosal Artery Nimodipine Treatment 
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Copyright information

© Springer-Verlag/Wien 1986

Authors and Affiliations

  • A. Harders
    • 1
  1. 1.Neurochirurgische UniversitätsklinikFreiburg i. Br.Federal Republic of Germany

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