Video Head Impulse Test (vHIT) – Fast Balance Reflex Test is part of the vertigo and vestibular glossary reviewed for patient education by Dr. Prateek Porwal, ENT and Vertigo Specialist.

The video head impulse test, or vHIT, measures how well the eyes stay locked on a target during quick head movements.

On this page

What video head impulse test means

The video head impulse test, or vHIT, measures how well the eyes stay locked on a target during quick head movements. The term is useful because vertigo is a symptom, not one single disease. A clear word like video head impulse test helps connect the symptom story with the examination and the right next test.

For patients, the main point is not to memorize the anatomy. The main point is to know whether the word points toward BPPV, an inner-ear balance disorder, a hearing-and-balance disorder, or a warning sign that needs urgent review.

Why it matters in vertigo care

It checks the vestibulo-ocular reflex and can identify weakness in specific semicircular canal pathways. This is why a short glossary definition is not enough. The same dizzy feeling can come from loose ear crystals, vestibular nerve weakness, migraine biology, blood pressure problems, medicine effects, anxiety-related dizziness or central neurological disease.

When video head impulse test is relevant, the doctor still has to match it with timing, triggers, hearing symptoms, neurological signs and examination findings.

How I use this finding in clinic

In clinic, I use vHIT information alongside history, examination and other tests because no single test explains every dizzy patient. I also check whether the pattern fits the patient’s age, medicines, fall risk, migraine history, ear symptoms and previous vertigo attacks.

This approach reduces two common mistakes: calling every dizziness attack BPPV, or treating every vertigo patient with only tablets without finding the actual mechanism.

What patients should do next

The head movements are quick but small. The test is different from a long spinning-chair type test. An abnormal vHIT result may support vestibular neuritis, bilateral vestibulopathy or a rehab plan depending on the full picture.

Bring details about the first attack, attack duration, head-position triggers, nausea, hearing change, tinnitus, headache, neck limitations, recent infection, head injury and current medicines. These details often matter more than a single scan or blood test.

This glossary page is for patient education only. It does not replace examination by a qualified doctor, especially when dizziness is new, severe, recurrent or linked with neurological symptoms.