What is the role of ultrasonography in the diagnosis of vertebrobasilar stroke?

Updated: Mar 03, 2020
  • Author: Vladimir Kaye, MD; Chief Editor: Stephen Kishner, MD, MHA  more...
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Answer

Answer

Transcranial Doppler (TCD) is used in the evaluation of cerebrovascular disease, but it often is inaccurate. Absence of signal in an initial examination does not necessarily mean occlusion.

TCD is helpful for purposes of follow-up once an initial evaluation has demonstrated the lesion. TCD has a sensitivity of 72% and a specificity of 94% in patients with basilar artery disease. [26]


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