Heart Rate Variability in Benign Paroxysmal Positional Vertigo

Inclusion Criteria: * BPPV Group Age 18 years or older Clinical diagnosis of benign paroxysmal positional vertigo (BPPV) confirmed by positional testing (Dix-Hallpike and/or Roll test) with positional nystagmus No known history of cardiac disease Ability and willingness to provide written informed consent Healthy Control Group Age 18 years or older No history of vertigo or known vestibular disorder Age- and sex-matched to the BPPV group No known history of cardiac disease Ability and willingness to provide written informed consent Exclusion Criteria: * Age younger than 18 years Inability to provide informed consent or impaired mental capacity Known arrhythmia, heart failure, ischemic heart disease, or other clinically significant cardiac disorder Use of medications that may directly affect heart rate variability, including beta-blockers, non-dihydropyridine calcium channel blockers, antiarrhythmic drugs, digoxin, systemic corticosteroids, centrally acting sympatholytic agents, or psychotropic medications that may influence autonomic balance Active infection or systemic inflammatory disease