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C-0753 - Subclavian steal syndrome: an underdiagnosed disease

R. O. Martins1, M. C. Calegari1, M. Lopes1, L. Santos2, L. Cruz2, R. Vasconcelos1, M. Natal2; 1 Brasília/BR 2 Brasilia/BR Type: Educational Exhibit
Area of Interests: Cardiovascular system, Head and neck, Arteries / Aorta
Imaging Techniques: Ultrasound-Spectral Doppler, CT-Angiography, MR-Angiography
Procedure: Education
Special Focuses: Arteriosclerosis, Education and training, Hemodynamics / Flow dynamics
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Learning objectives: The objective of this presentation is to review the teaching points of the subclavian steal syndrome (SSS); clinical findings and imaging features based on personal archive will be highlighted.  

Background: Subclavian steal occurs due to the presence of subclavian artery stenosis before the emergence of the vertebral artery, most common in the origin of the aortic arch, leading to a retrograde flow through the ipsilateral vertebral artery and circle of Willis. When the steal is associated with neurolog[...]

Findings and procedure details: 1 – MRA – Magnetic Resonance Angiography  MRA methods, many of which are sensitive to direction of flow, offer an attractive alternative, for example, phase-contrast MRA methods inherently encode direction of flow and can show subclavian stenosis and reversal of flow in the vertebral artery.&nb[...]

Conclusion: In the past years the SSS has been an under diagnosed disease, but with the technology evolution and increased radiologist experience a higher number of cases have clearly raised the prevalence data. Early diagnosis can prevent drastic complications and highlight the importance of proper evaluation [...]

Personal information:

References: 1 – Kremmyda, O.; Holtmannspoetter M.. et al. Symptomatic Complete Vertebral Carotid Steal Syndrome Caused by Innominate Artery Stenosis anda n Arteriovenous Right Forearm Fistula. J Ultrasound Med 2011; 30:1599-1603.   2 – Potter, B.J.. PINTO. D.S. Subclavian Steal Syndrome. Circulation. 2014[...]

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