What is vertigo patient HINTS test as discussed in the GRACE-3 guidelines? Full lecture: The Optimal Diagnosis and Treatment of Emergency Department Patients with Dizziness and Vertigo: The GRACE-3 Guideline Recommendations Guidelines for reasonable and appropriate care in the emergency department 3 (GRACE-3): Acute dizziness and vertigo in the emergency department Jonathan A. Edlow, MD et al Acad Emerg Med. 2023;30:442–486. This guideline addresses the following: How to categorize dizziness and