article · Clinical Case Reports
Chronic dizziness in elderly patients, particularly when reproducibly triggered by upper limb exertion, should prompt evaluation for arm-exertion-provoked vertebrobasilar hypoperfusion due to subclavian steal syndrome. Duplex ultrasonography can identify complete retrograde vertebral artery flow and confirm complete Grade III subclavian steal physiology, highlighting a treatable vascular cause that may otherwise be misattributed to vestibular, medication-related, or neurodegenerative disease.
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DOI: 10.1002/ccr3.73355
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