Discrepancy Between the Results of TCD and the Clinical Status of Patients After SAH

  • E. Wranze-Bielefeld
  • W. A. Dauch
  • B. L. Bauer
Part of the Advances in Neurosurgery book series (NEURO, volume 18)


Transcranial Doppler sonography has become a widely accepted diagnostic method for the detection of intracranial vascular pathologies. It seems clear that vasospasm is often combined with neurological deficits. We use the terminology of Harders [3] in speaking about normal cerebral blood flow and subcritical and critical vasospasm detected by TCD (normal cerebral blood flow: velocity below 80cm/s; slight vasospasm: velocity up to 120cm/s; severe vasospasm: velocity above this value as detected in the MCA). In 1987 Seiler and Grolimund [6] described vasospasm found in patients who were clinically asymptomatic. They discussed this phenomenon and speculated that it is due to a lack of autoregulation and perhaps better collateralization in the affected area.


Cerebral Blood Flow Posterior Fossa Blood Flow Velocity Intracranial Aneurysm Transcranial Doppler Sonography 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • E. Wranze-Bielefeld
  • W. A. Dauch
  • B. L. Bauer
    • 1
  1. 1.Neurochirurgische AbteilungPhilipps Universität MarburgMarburgGermany

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