The VAN assessment (see table below) begins with a simple assessment of upper extremity weakness. If the patient exhibits weakness (minimum is any drift) they then proceed to vision, aphasia and neglect testing. If either vision, aphasia or neglect assessment is abnormal, the patient should be suspected of having a LVO. If there is no weakness, the patient is deemed to not have an LVO and the vision, aphasia and neglect pieces of the assessment are not carried out.


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