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SeizuresEPILEPTIC / Non Epileptic
What is that ???
Dr. Samir KhalilConsultant Pediatric Neurologist
Makassed Hospital
Clinical Assistant Professor
Al-Quds University
Al-Quds University
School of Medicine
Lectures 5th year
Updated September, 2012
attack
Is used to describe epileptic & non- epileptic disorder.
We say:
Attack of laughing
Breath Holding Attack / or spell
An attack of febrile convulsion
Conversion Reaction
Epileptic attack
convulsion
An intense, paroxysmal, involuntary contraction or series of contractions of voluntary muscles
convulsion
If there is no movement (displacement in place), the term “convulsion” is not applied.
The term
“convulsion”
implies
movement/s
convulsion
We say:
Clonic convulsion but not tonic convulsions Tonic-clonic convulsions Myoclonic convulsion but not absence
convulsion.
……Absence / Petit male is not a convulsion
Neither arrhythmia nor tachycardia nor apnea
seizure
A sudden, involuntary event/s that may include:
Motor activity
Altered level of consciousness
Somatosensory symptoms
Seizure vs Convulsion
A convulsive attack:
Always labeled as seizure Contrary, not all seizures convulse
So a seizure is not synonym to convulsion
We sayEpileptic seizure/s. Grand male seizure/s.Petit male seizure/s.His absence seizures are completely controlled by Valproic acid
Seizures’ Patterns
Myoclonic
Infantile
Spasm
OpsoMyoclonic
Un
Classified
Status
Epilepticus
TONIC CLONIC TONIC-
CLONIC
ATONIC
Absence
Seizures’ Pattern
StatusEpilepticus
A seizure for more than 30 minutes
Or
Frequent Seizures without Regaining
Usual State of
Consciousness
1st Key Question
Is it a seizure ?
3rd Key Question
Which type of epilepsy ?
4th Key Question
How to classify ?
2nd Key Question
Is it epileptic or non epileptic ?
Seizureswork up
Classification of Seizures
Nonepileptic
Epileptic Seizures are
non occasional (non-provoked) chronic seizures in which one single attack is not
considered as epilepsy.
Classification of Seizures
Epileptic
Non-epileptic seizures are
occasional (provoked) seizures produced by an acute identified cause
(pyretic, infectious, traumatic or metabolic)
Classification of Seizures
Epileptic Seizures
Non Occasional Chronic
Non-Epileptic Seizures
Occasional Acute
definition of epilepsy
A chronic clinical condition defined as 2 or more seizures
resulting from hypersynchronous electrical discharge of a
population of neurons and not secondary to specific provocation factor such as fever, infection,
electrolyte imbalances or trauma
Pathophysiology of epilepsy
Epilepsy Abnormal, hypersynchronous electrical
activation of a population of neurons in the cerebral cortex, either in:
Localized area Focal //Partial seizure
Multiple areas Generalized seizure
Pathophysiology of epilepsy
(GABA) GammaAminobutyric Acid
Excitatory
Neurotransmitters
Acetylcholine (Ach) GlutamateAspartate
Inhibitory
Pathophysiology of epilepsy
(GABA) GammaAminobutyric Acid
Excitatory
Neurotransmitters
Acetylcholine (Ach) GlutamateAspartate
Inhibitory
Any perturbation that interferes with the synthesis, release, re-uptake or metabolism of these neurotransmitters may result in
the occurrence of a seizure.
Pathophysiology of epilepsy
Many pharmacologic therapies for seizures act upon these neurotransmitters
Increase Inhibition
Decrease Excitation
Controversy exists regarding the duration of seizure necessary to cause neuronal cell injury.
Most, brief seizures, do not cause brain damage.
Pathophysiology of epilepsy
classification ofepilepsy
Idiopathic (Primary)Epilepsy
Unknown etiology
Neurological Examine
absolutely normal
Paraclinical explorations are
normal
Secondary Epilepsy
A chronic affection of
the brain by means of
actual methods ofexploration
Cryptogenic Epilepsy
A chronic affection of
the brain which isobscure or
doubtful by means of actualmethods of
exploration
classification ofepilepsy
Idiopathic (Primary)Epilepsy
Unknown etiology
Neurological Examine
absolutely normal
Paraclinical explorations are
normal
Secondary Epilepsy
A chronic affection of
the brain by means of
actual methods ofexploration
Cryptogenic Epilepsy
A chronic affection of
the brain which isobscure or
doubtful by means of actualmethods of
exploration
classification ofepilepsy
Idiopathic (Primary)Epilepsy
Unknown etiology
Neurological Examine
absolutely normal
Paraclinical explorations are
normal
Secondary Epilepsy
A chronic affection of
the brain by means of
actual methods ofexploration
Cryptogenic Epilepsy
A chronic affection of
the brain which isobscure or
doubtful by means of actualmethods of
exploration
classification ofepilepsy
Idiopathic (Primary)Epilepsy
Unknown etiology
Neurological Examine
absolutely normal
Paraclinical explorations are
normal
Secondary Epilepsy
A chronic affection of
the brain by means of
actual methods ofexploration
Cryptogenic Epilepsy
A chronic affection of
the brain which isobscure or
doubtful by means of actualmethods of
exploration
Generalized Epilepsy
Secondary Generalized
Epilepsy
Status Epilepticus
Partial epilepsy (simple & complex)
Classification of epilepsy
Provoked seizures associated with a fever, electrolyte abnormality, or other metabolic derangement, are usually generalized rather than focal.
Presentationepilepsy
Classification of Epilepsy(According to Extension)
By means of: Clinical presentation Electrical Guidance (EEG)
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Status Epilepticus
• A continuous seizure activity lasting
> 30 minutes, or
• The occurrence of ≥ 2 seizures in quick succession without return to usual level of consciousness
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An emergency neurologic sequelae or death if treatment is delayed
Seizure Presentation On arrival at the ER
• On active seizure• Shaking, deviation of eyes, frothy secretions,…. Staring• Breath holding (apneic) with cyanosis
• Early post-ictal Drowsy, in deep sleep, paralytic (odd),………
• Late post-Ictal • Free of any manifestation (conscious alert ……..the attack is
past).
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Seizure Presentation On arrival at the ER
• 1st attack• Previous attacks (1, 2 or more)
• Under treatment with AED (withdrawal)• Never been treated with AED
• fever
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Seizure Presentation On arrival at the ER
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The minority
New onset, non-febrile seizure
A very small %
Status epilepticus
Most not seizing upon arrival in the casualty department
The MajorityFebrile convulsion or A known previous seizures
Prognosis / expectations
• The majority of pediatric seizures are single events without neurologic sequelae and most recurrent seizures can be controlled with medications.
• Occasionally, however, seizures can be life-threatening (status epilepticus)
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Incidence of Epilepsy
• About 3-5% of children will have at least one seizure by the age of 5 yr.:
• >50% Benign febrile seizures. • 15% acute provoked seizure:
– The leading cause:» Children under 5yr. /CNS infection» Adolescents / Head trauma
• 10% Single unprovoked seizure and will never have another seizure
• The remaining 25% Recurrent seizures or epilepsy
80
Incidence of Epilepsy
• ¾ …… Idiopathic, with no known cause • ¼ ……Identifiable brain pathology or underlying metabolic
disorders.
• A family history of epilepsy in 1st-degree relatives was found in 46.6% of patients.
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Seizure work-up
To R/O conditions mimic seizures
• The exact nature of the seizure:– Does the child have a known seizure disorder? – If this is the child’s 1st seizure, was the seizure febrile or
non-febrile? – Was the seizure partial, generalized, or partial with
secondary generalization? – Was the seizure provoked or unprovoked?
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