When a patient says, “The room spins when I roll over or sit up,” your next move could change everything. Vertigo — especially   Benign Paroxysmal Positional Vertigo (BPPV)   — is one of the most common yet most treatable causes of dizziness.   START Precise screening — and do it right.   Use the Dix–Hallpike test for posterior canal BPPV and the Roll Test (Pagnini–McClure) for horizontal canal involvement.    Seat the patient, turn their head 45° toward the test side. Quickl