What are the classifications of vertigo based on anatomic origin and duration?

Vertigo Classification

Vertigo is classified into two primary systems: by anatomic origin (peripheral vs. central) and by temporal pattern (acute, episodic triggered, episodic spontaneous, and chronic vestibular syndromes).

Classification by Anatomic Origin

Peripheral (Vestibular) Vertigo

Peripheral vertigo originates from the inner ear or vestibular apparatus 1. Key distinguishing features include:

• Positional triggers that provoke symptoms with head movement relative to gravity 1
• Torsional nystagmus that fatigues with repeated testing 1
• Absence of other neurologic signs beyond vestibular symptoms 1
• Nystagmus suppressed by visual fixation 1

Common peripheral causes include:

• Benign paroxysmal positional vertigo (BPPV) - most common, accounting for 42% of vertigo cases in primary care 1
• Vestibular neuritis (41% of cases) 1
• Ménière's disease (10% in primary care, up to 43% in subspecialty settings) 1
• Labyrinthitis 1
• Superior canal dehiscence syndrome 1
• Perilymph fistula 1

Central (CNS) Vertigo

Central vertigo arises from brainstem, cerebellar, or other CNS pathology 1. Critical red flags include:

• Downbeating nystagmus on Dix-Hallpike maneuver without torsional component 1
• Direction-changing nystagmus without head position changes (periodic alternating nystagmus) 1
• Gaze-evoked or direction-switching nystagmus 1
• Baseline nystagmus without provocative maneuvers 1
• Associated neurologic deficits such as dysarthria, dysmetria, dysphagia, sensory/motor loss, or Horner's syndrome 1
• Nystagmus not suppressed by visual fixation 1

Central causes include:

• Brainstem or cerebellar stroke (10% of cerebellar strokes present like peripheral vestibular disorders) 1
• Vestibular migraine (lifetime prevalence 3.2%, accounts for 14% of vertigo cases) 1
• Vertebrobasilar insufficiency 1
• Multiple sclerosis 1
• Posterior fossa tumors 1
• Central paroxysmal positional vertigo 1

Classification by Temporal Pattern (Duration)

The American Academy of Otolaryngology-Head and Neck Surgery guidelines define four distinct vestibular syndromes based on timing and triggers 1:

1. Acute Vestibular Syndrome (AVS)

• Duration: Continuous dizziness lasting days to weeks 1
• Characteristics: Acute persistent vertigo with nausea, vomiting, and intolerance to head motion 1
• Examples: Vestibular neuritis, labyrinthitis, posterior circulation stroke, demyelinating diseases 1

2. Triggered Episodic Vestibular Syndrome

• Duration: Episodes lasting seconds to <1 minute 1
• Characteristics: Vertigo triggered by specific obligate actions, usually head or body position changes 1
• Primary example: BPPV (posterior canal 85-95% of cases, lateral canal remainder) 1
• Differentiation: Postural hypotension, central paroxysmal positional vertigo 1

3. Spontaneous Episodic Vestibular Syndrome

• Duration: Episodes lasting minutes to hours 1, 2
• Characteristics: Episodic vertigo not triggered by specific actions 1
• Examples:
  • Vestibular migraine (5 minutes to 72 hours, requires ≥5 episodes with migraine features) 1
  • Ménière's disease (hours-long attacks with fluctuating hearing loss, tinnitus, aural fullness) 1
  • Vertebrobasilar insufficiency (typically <30 minutes) 1, 2
  • Superior canal dehiscence (pressure-triggered, not position-triggered) 1
  • Vestibular paroxysmia 3

4. Chronic Vestibular Syndrome

• Duration: Dizziness lasting weeks to months or longer 1
• Characteristics: Persistent symptoms without discrete episodic pattern 1
• Examples: Anxiety/panic disorder, medication side effects, persistent postural-perceptual dizziness, bilateral vestibulopathy, cervicogenic vertigo 1, 3

Critical Clinical Distinctions

Duration is the most reliable differentiator between central and peripheral causes in recurrent vertigo: vertebrobasilar insufficiency typically lasts minutes, while peripheral causes like Ménière's disease last hours 2.

Hearing loss patterns help distinguish etiologies:

• BPPV: no hearing loss 1
• Ménière's disease: fluctuating hearing loss with vertigo 1
• Vestibular neuritis: no hearing loss 1
• Labyrinthitis: profound hearing loss with prolonged vertigo 1

Failure to respond to canalith repositioning procedures or vestibular rehabilitation should raise concern that the diagnosis is not BPPV and may represent a central etiology 1.