What is the role of transcranial Doppler sonography in the workup of vertebral artery dissection (VAD)?

Updated: Feb 21, 2019
  • Author: Eddy S Lang, MDCM, CCFP(EM), CSPQ; Chief Editor: Barry E Brenner, MD, PhD, FACEP  more...
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Answer

Transcranial Doppler is approximately 75% sensitive to the flow abnormalities seen in VAD. It is useful also in detecting high-intensity signals (HITS), which are characteristic of microemboli propagating distally as a result of the dissection. HITS are associated with symptomatic ischemic symptoms both in VAD and in other types of cerebrovascular disease.


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