DEFINITION
DEFINITION
- Perception of sound without external stimulus
- Types:
- Primary vs Secondary
- Persistent vs Intermittent
- Unilateral vs Bilateral
- Objective vs Subjective
- Pulsatile vs Non-pu
PREVALENCE
- 13% of population affected
ETIOLOGY
Primary: idiopathic
- Secondary causes:
- Viral labyrinthitis
- Vestibular neuritis
- Meniere’s disease
- Medications: aminoglycosides, loop diuretics, aspirin, NSAIDs, sodium valproate
- Post-traumatic
- Vascular/cardiovascular (pulsatile type)