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22:11 CET
C-0854 - Doppler ultrasonography - an important key in the diagnosis of subclavian steal syndrome
K. Kasnik, T. Krpan; Zagreb/HR
Type: Educational Exhibit
Area of Interests: Vascular, Ultrasound physics, Arteries / Aorta
Imaging Technique: Ultrasound-Spectral Doppler
Procedures: Education, Diagnostic procedure
Special Focuses: Hemodynamics / Flow dynamics, Arteriosclerosis

Learning objectives:
1. To analyze the value of Doppler ultrasonography as the first diagnostic tool in patients with suspected subclavian steal syndrome (SSS). 2. To describe the mechanism that causes subclavian steal phenomenon. 3. To show the imaging findings of techniques available for the diagnosis of SSS.
Background:
Subclavian steal syndrome (SSS) refers to a phenomenon of flow reversal in the vertebral artery ipsilateral to a hemodynamically significant stenosis or occlusion of the subclavian artery. Physiology of SSS involves high-grade stenosis, or occlusion of the subclavian artery proximal to the origin [...]
Findings and procedure details:
Procedures for evaluation of the SSS are: Doppler ultrasonography, Magnetic resonance angiography (MRA), Computed tomography angiography (CTA), Contrast angiography (DSA). 1. Doppler ultrasonography Doppler ultrasonography is usually a first diagnostic tool because of its non-invasiveness, acces[...]
Conclusion:
Doppler ultrasonography is the principal screening tool in the diagnosis of SSS. Adequate analysis of vertebral arterial waveforms can provide the information about the vascular morphology and the severity of hemodynamic disturbances in the vertebral artery which is necessary to make an accurate d[...]
Personal information:
Katarina Kašnik, MD Radiology resident Dept. Radiology, UHC “Sestre milosrdnice”, Zagreb/CRO. e-mail: kkasnik@gmail.com
References:
1. Reivich M, Holling HE, Roberts B, Toole JF. Reversal of Blood Flow through the Vertebral Artery and Its Effect on Cerebral Circulation. N Engl J Med. 1961; 265:878-885. 2. Ochoa VM, Yeghiazarians Y. Subclavian artery stenosis: a review for the vascular medicine practitioner. Vasc Med. 2011; 16:[...]

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