Basilar artery vasospasm: Diagnosis and grading by transcranial Doppler

Gill E. Sviri, M. Zaaroor, G. W. Britz, C. M. Douville, A. Lam, D. W. Newell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The aim of the study is to better define transcranial Doppler (TCD) criteria for posterior circulation vasospasm. Basilar artery (BA) diameters were measured and compared with diameters obtained from baseline arteriograms in 144 artheriographies done in patients with aneurysmal subarachnoid haemorrhage (SAH). Both BA and extracranial vertebral artery (ECVA) flow velocities (FV) were measured by TCD in order to obtain an intracranial/extracranial flow velocities ratio. The velocity ratio between the basilar artery and the extracranial vertebral arteries (BA/VA) strongly correlated with the degree of BA narrowing (p<0.0001). A ratio higher than 2.0 was associated with 73% sensitivity and 80% specificity for BA vasospasm. A ratio higher than 2.5 with BA velocity greater than 85 cm/sec was associated with 86% sensitivity and 97% specificity for BA narrowing of more than 25%. A BA/VA ratio higher than 3.0 with BA velocities higher than 85 cm/sec was associated with 92% sensitivity and 97% specificity for BA narrowing of more than 50%. Our data show that the BA/VA ratio improves the sensitivity and specificity of TCD detection of BA vasospasm.

Original languageEnglish (US)
Title of host publicationCerebral Vasospasm
Subtitle of host publicationNew Strategies in Research and Treatment
PublisherSpringer-Verlag Wien
Pages255-257
Number of pages3
Edition104
ISBN (Print)9783211757178
DOIs
StatePublished - 2008

Publication series

NameActa Neurochirurgica, Supplementum
Number104
ISSN (Print)0065-1419

Keywords

  • Angiography
  • basilar artery
  • subarachnoid haemorrhage
  • transcranial Doppler
  • vasospasm

ASJC Scopus subject areas

  • Clinical Neurology
  • Surgery

Fingerprint Dive into the research topics of 'Basilar artery vasospasm: Diagnosis and grading by transcranial Doppler'. Together they form a unique fingerprint.

Cite this