Difference between revisions of "First-time seizure"

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*[[Hypertensive encephalopathy]]
 
*Anoxic-ischemic injury ([[cardiac arrest]], severe hypoxemia)
 
*Anoxic-ischemic injury ([[cardiac arrest]], severe hypoxemia)
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{{Seizure DDX}}
  
 
==Diagnosis==
 
==Diagnosis==

Revision as of 11:54, 25 August 2015

Background

Seizure Types

Classification is based on the international classification from 1981[1]; More recent terms suggested by the ILAE (International League Against Epilepsy) task Force.[2]

Focal seizures

(Older term: partial seizures)

  • Without impairment in consciousness– (AKA Simple partial seizures)
    • With motor signs (ex. facial twiching or rhythmic ipsilateral extremity movements)
    • With sensory symptoms (ex. tingling or pereiving a certain smell)
    • With autonomic symptoms or signs (ex. tachycardia or diaphoresis)
    • With psychic symptoms (including aura, ex. sense of déjà-vu)
  • With impairment in consciousness - (AKA Complex Partial Seizures--Older terms: temporal lobe or psychomotor seizures)
    • Simple partial onset, followed by impairment of consciousness
    • With impairment of consciousness at onset
  • Focal seizures evolving to secondarily generalized seizures
    • Simple partial seizures evolving to generalized seizures
    • Complex partial seizures evolving to generalized seizures
    • Simple partial seizures evolving to complex partial seizures evolving to generalized seizures

Generalized seizures

  • Absence seizures (Older term: petit mal; brief dissociative states without postural changes)
    • Typical absence seizures
    • Atypical absence seizures
  • Myoclonic seizure (violent muscle contractions)
  • Clonic seizures (rhythmic jerking)
  • Tonic seizures (stiffening)
  • Tonic–clonic seizures (Older term: grand mal)
  • Atonic seizures (loss of muscle tone)

SUDEP[3]

  • Sudden Unexpected Death in Epilepsy
  • Generalized tonic-clonic seizure is the major risk factor for SUDEP, and seizure freedom is strongly associated with decreased risk
    • Annual incidence of SUDEP in children is 1 in 4500
    • Incidence in adults is 1 in 1000

Clinical Features

  • Abrupt onset, may be unprovoked
  • Brief duration (typically <2min)
  • AMS
  • Jerking of limbs
  • Postictal drowsiness/confusion
  • Todd paralysis
  • Lateral tongue biting - 100% specificity

Differential Diagnosis

Causes of first-time seizure

Seizure

Diagnosis

Work-up

Evaluation

Management

Disposition

See Also

External Links

References

  1. Proposal for revised clinical and electroencephalographic classification of epileptic seizures. From the Commission on Classification and Terminology of the International League Against Epilepsy. Epilepsia 1981; 22:489.
  2. Epilepsia 2015; 56:1515-1523.
  3. Harden C et al. American Academy of Neurology and the American Epilepsy Society. Practice guideline summary: Sudden unexpected death in epilepsy incidence rates and risk factors. Neurology April 25, 2017 vol. 88 no. 17 1674-1680.