During the Vertebral Artery Test, what is a positive indication?

A positive indication during the Vertebral Artery Test is characterized by symptoms that suggest compromised blood flow through the vertebral arteries, which supply the posterior circulation of the brain. Dizziness or nystagmus indicates that there may be a disturbance in the vestibular system or a transient ischemic event affecting blood flow. These symptoms are particularly concerning because they can signal insufficient blood supply to areas of the brain responsible for balance and coordination.

Dizziness reflects a potential issue with the blood flow that can lead to vertiginous symptoms, while nystagmus, which involves involuntary eye movements, can also indicate neurological involvement and vestibular dysfunction. Together, these findings serve as important clinical indicators during the test, guiding further assessment and management to ensure patient safety.