Presentation
A 60-year-old female patient presenting with vertigo. On spectral Doppler ultrasonography of the left vertebral artery showed antegrade and retrograde flow. The patient was referred for MR angiography.
Patient Data
Age: 60 years
Gender: Female
From the case:
Subclavian steal syndrome
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Severe stenosis of the left subclavian artery at its origin measuring approximately 3 cm in length.
From the case:
Subclavian steal syndrome
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Severe stenosis of the left subclavian artery (yellow arrow) at its origin measuring approximately 3 cm in length.
Case Discussion
Subclavian steal syndrome results from occlusion or severe stenosis of the proximal subclavian artery resulting in complete retrograde or antegrade-retrograde flow in the ipsilateral vertebral artery.
The most important signs in the Doppler examination of the vertebral arteries include:
- presence or absence of flow
- direction of blood flow
- flow pattern
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