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British Journal of Radiology (2004) 77, 15-20
© 2004 British Institute of Radiology
doi: 10.1259/bjr/70447093
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Ultrasound of the extracranial vertebral artery

T M Buckenham, FRACR, FRCR, MBChB and I A Wright, PhD

Department of Radiology, Christchurch Hospital, Private Bag 4710, Christchurch, New Zealand



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  		Figure 1. Normal vertebral artery Doppler waveform.

 


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  		Figure 2. A "pre-bunny" vertebral artery Doppler waveform. Duplex ultrasound showed an ipsilateral subclavian artery origin stenosis of approximately 50%.

 


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  		Figure 3. A "bunny" waveform from the left vertebral artery (VA) of a patient with coronary–subclavian steal syndrome caused by a 90% stenosis within a left subclavian artery stent. This usually manifests itself in complete reversal of VA flow, although in this case there were concomitant ipsilateral common and internal carotid artery origin stenoses of 50% and 90%, respectively, and the right VA was diffusely diseased on arteriography.

 


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  		Figure 4. Bidirectional vertebral artery Doppler waveform.

 


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  		Figure 5. Retrograde vertebral artery Doppler waveform.

 


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  		Figure 6. Bisferious vertebral artery Doppler waveform in a patient with severe aortic stenosis and mild aortic incompetence.

 


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  		Figure 7. Tardus vertebral artery (VA) Doppler waveform, seen distal to a tight VA origin stenosis (confirmed by MR angiography).

 


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  		Figure 8. High resistance vertebral artery (VA) Doppler waveform seen in the intertransverse segment. Distal occlusion of the VA was confirmed on angiography.

 




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