Acute loss of consciousness

Differential

• Syncope (Insufficient cerebral perfusion)
  • Cardiac
    • Arrhythmia
    • Cardiac outflow obstruction
  • Hypotension
    • Vasovagal episode
    • Other causes
• Seizure
• Psychogenic event (pseudo seizure)
• Acute increase in ICP (acute hydrocephalus)
• Brain stem TIA affecting the reticular activating system
• Narcolepsy