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Clinical report demonstrates exercise-induced vertebrobasilar insufficiency from subclavian steal syndrome in elderly patients, highlighting a treatable cause of chronic dizziness.
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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Ahmed et al. (2026) studied this question.
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