Seizure: Difference between revisions

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{{Infobox_Disease |
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| [[File:Siren.gif|30px|link=Seizure resident survival guide]]|| <br> || <br>
  DiseasesDB    = 19011 |
| [[Seizure resident survival guide|'''Resident'''<br>'''Survival'''<br>'''Guide''']]
  ICD10          = {{ICD10|G|40||g|40}}, {{ICD10|I|64||i|64}}, {{ICD10|P|90||p|90}}, {{ICD10|R|56||r|56}}|
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  MeshID        = D012640 |
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{{Seizure}}
{{Seizure}}


'''For patient information click [[{{PAGENAME}} (patient information)|here]]'''
'''For patient information click [[{{PAGENAME}} (patient information)|here]]'''


{{CMG}}
{{CMG}} {{AE}} {{SHA}}


==Diagnosis==
{{SK}} Fits, convulsions


It can be difficult to distinguish a seizure from other conditions causing a collapse, abnormal movements or other seizure manifestations. A 2007 [[Evidence based medicine|evidence-based]] review from the [[American Academy of Neurology]] and the American Epilepsy Society recommends an [[electroencephalogram]] (EEG, brain wave activity) and brain imaging with [[CT scan]] or [[MRI scan]] in the work-up of adults presenting with a first apparently unprovoked seizure. [[Blood tests]], [[lumbar puncture]] or toxicology screening can be helpful in specific circumstances suggestive of an underlying cause like [[meningitis]] or [[drug overdose]], but there is insufficient evidence to support their routine use in the work-up of an adult with an apparently unprovoked first seizure.<ref name="AAS2007">Krumholz A, Wiebe S, Gronseth G, Shinnar S, Levisohn P, Ting T, Hopp J, Shafer P, Morris H, Seiden L, Barkley G, French J; Quality Standards Subcommittee of the American Academy of Neurology; American Epilepsy Society. Practice Parameter: evaluating an apparent unprovoked first seizure in adults (an evidence-based review): report of the Quality Standards Subcommittee of the American Academy of Neurology and the American Epilepsy Society. ''Neurology'' 2007; '''69(21)''': 1996-2007. PMID 18025394</ref>
==[[Seizure overview|Overview]]==
==[[Seizure historical perspective|Historical Perspective]]==


===Determining whether a seizure occurred===
==[[Seizure classification|Classification]]==
==[[Seizure pathophysiology|Pathophysiology]]==
==[[Seizure causes|Causes]]==
==[[Seizure differential diagnosis|Differentiating Seizure from other Diseases]]==


Differentiating a seizure from other conditions such as [[Fainting|syncope]] can be difficult. In addition, 5% of patients with a positive [[tilt table test]] may have seizure-like activity that seems to be due to [[cerebral hypoxia]].<ref name="pmid12963568">{{cite journal |author=Passman R, Horvath G, Thomas J, ''et al'' |title=Clinical spectrum and prevalence of neurologic events provoked by tilt table testing |journal=Arch. Intern. Med. |volume=163 |issue=16 |pages=1945-8 |year=2003 |pmid=12963568 |doi=10.1001/archinte.163.16.1945}}</ref>
==[[Seizure epidemiology and demographics|Epidemiology and Demographics]]==


====Physical examination====
==[[Seizure risk factors|Risk Factors]]==
==[[Seizure screening|Screening]]==


A small study found that finding a bite to the side of the tongue was very helpful when present<ref name="pmid7487261">{{cite journal |author=Benbadis SR, Wolgamuth BR, Goren H, Brener S, Fouad-Tarazi F |title=Value of tongue biting in the diagnosis of seizures |journal=Arch. Intern. Med. |volume=155 |issue=21 |pages=2346-9 |year=1995 |pmid=7487261 |doi=}}</ref>"
==[[Seizure natural history, complications and prognosis|Natural History, Complications and Prognosis]]==
* [[sensitivity (tests)|sensitivity]] of  24%
==Diagnosis==
* [[specificity (tests)|specificity]] of 99%
[[Seizure history and symptoms|History and Symptoms]] | [[Seizure physical examination|Physical Examination]] | [[Seizure laboratory findings|Laboratory Findings]] | [[Seizure electroencephalogram|Electroencephalogram]] | [[Seizure CT|CT]] | [[Seizure MRI|MRI]] | [[Seizure other imaging findings|Other Imaging Findings]] | [[Seizure other diagnostic studies|Other Diagnostic Studies]]
 
====Serum prolactin level====
 
Two [[meta-analysis|meta-analyses]] have quantified the role of an elevated serum prolactin.
The first meta-analysis found that<ref name="pmid14988379">{{cite journal |author=Ahmad S, Beckett MW |title=Value of serum prolactin in the management of syncope |journal=Emergency medicine journal : EMJ |volume=21 |issue=2 |pages=e3 |year=2004 |pmid=14988379 |doi=}}</ref>:
"If a serum prolactin concentration is greater than  three times the baseline when taken within one hour of syncope, then in the  absence of test "modifiers":
# the patient is nine times more likely to have  suffered a GTCS as compared with a pseudoseizure positive LR = 8.92 (95% CI  (1.31 to 60.91)), SN = 0.62 (95% CI (0.40 to 0.83)), SP = 0.89 (95% CI (0.60 to  0.98))
# five times more likely to have suffered a GTCS as compared with  non-convulsive syncope positive LR 4.60 (95% CI (1.25 to 16.90)), SN = 0.71 (95% CI (0.49 to 0.87)), SP = 0.85 (95%  CI (0.55 to 0.98)). "
 
The second meta-analysis found:<ref name="pmid16157897">{{cite journal |author=Chen DK, So YT, Fisher RS |title=Use of serum prolactin in diagnosing epileptic seizures: report of the Therapeutics and Technology Assessment Subcommittee of the American Academy of Neurology |journal=Neurology |volume=65 |issue=5 |pages=668-75 |year=2005 |pmid=16157897 |doi=10.1212/01.wnl.0000178391.96957.d0}}</ref>
#"Elevated serum prolactin assay, when measured in the  appropriate clinical setting at 10 to 20 minutes after a suspected event, is a  useful adjunct for the differentiation of generalized tonic-clonic or complex  partial seizure from psychogenic nonepileptic seizure among adults and older  children (Level B)."
#"Serum prolactin assay does not distinguish  epileptic seizures from syncope (Level B).
#"The  use of serum PRL assay has not been established in the evaluation of status"  epilepticus, repetitive seizures, and neonatal seizures (Level U)."
 
The serum prolactin level is less [[sensitivity (tests)|sensitive]] for detecting partial seizures.<ref name="pmid15256189">{{cite journal |author=Shukla G, Bhatia M, Vivekanandhan S, ''et al'' |title=Serum prolactin levels for differentiation of nonepileptic versus true seizures: limited utility |journal=Epilepsy & behavior : E&B |volume=5 |issue=4 |pages=517-21 |year=2004 |pmid=15256189 |doi=10.1016/j.yebeh.2004.03.004}}</ref>
 
====EEG====
 
An isolated abnormal electrical activity recorded by an [[electroencephalography]] examination without a clinical presentation is called subclinical seizure. They may identify background epileptogenic activity, as well as help identify particular causes of seizures.
 
===Investigation of underlying cause===
 
Additional diagnostic methods include [[CT Scan]]ning and [[MRI]] imaging or angiography.  These may show structural lesions within the brain, but the majority of those with epilepsy show nothing unusual. 
 
As seizures have a [[differential diagnosis]], it is common for patients to be simultaneously investigated for cardiac and endocrine causes. Checking [[glucose]] levels, for example, is a mandatory action in the management of seizures as [[hypoglycemia]] may cause seizures, and failure to administer glucose would be harmful to the patient. Other causes typically considered are [[Fainting|syncope]] and [[cardiac arrhythmia]]s, and occasionally [[panic attack]]s and [[cataplexy]]. For more information, see [[non-epileptic seizures]].
 
==Management==
 
The first aid for a seizure depends on the type of seizure occurring. Generalized seizures will cause the person to fall, which may result in injury. A tonic-clonic seizure results in violent movements that cannot and should not be suppressed. The person should never be restrained, nor should there be any attempt to put something in the mouth. Potentially sharp or dangerous objects should also be moved from the vicinity, so that the individual is not hurt. After the seizure if the person is not fully conscious and alert, they should be placed in the [[recovery position]].
 
It is not necessary to call an ambulance if the person is known to have epilepsy, if the seizure is shorter than five minutes and is typical for them, if it is not immediately followed by another seizure, and if the person is uninjured. Otherwise, or if in any doubt, medical assistance should be sought.
 
A seizure longer than five minutes is a medical emergency. Relatives and other caregivers of those known to have epilepsy often carry medicine such as rectal [[diazepam]] or [[buccal mucosa|buccal]] [[midazolam]] in order to rapidly end the seizure.
 
===Safety===


A sudden fall can lead to broken bones and other injuries. Children who are affected by frequent drop seizures may wear helmets to protect the head during a fall.
==Treatment==
[[Seizure medical therapy|Medical Therapy]] | [[Seizure surgery|Surgery]] | [[Seizure primary prevention|Primary Prevention]] | [[Seizure secondary prevention|Secondary Prevention]] | [[Seizure cost-effectiveness of therapy|Cost-Effectiveness of Therapy]] | [[Seizure future or investigational therapies|Future or Investigational Therapies]]


The unusual behavior resulting from the chaotic brain activity of a seizure can be misinterpreted as an aggressive act. This may invoke a hostile response or police involvement, where there was no intention to cause harm or trouble. During a prolonged seizure, the person is defenseless and may become a victim of theft.
==Case Studies==
[[Seizure case study one|Case #1]]


A [[seizure response dog]] can be trained to summon help or ensure personal safety when a seizure occurs. These are not suitable for everybody. Rarely, a dog may develop the ability to sense a seizure before it occurs.<ref name=Dalziel_2003>{{cite journal |author=Dalziel D, Uthman B, Mcgorray S, Reep R |title=Seizure-alert dogs: a review and preliminary study |journal=Seizure |volume=12 |issue=2 |pages=115-20 |year=2003 |pmid=12566236}}</ref>
==Related Chapters==
 
==See also==


*[[Epilepsy]]
*[[Epilepsy]]
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*[[Psychogenic non-epileptic seizures]]
*[[Psychogenic non-epileptic seizures]]
*[[EPUNA]]
*[[EPUNA]]
==References==
{{Reflist|2}}






[[es:Convulsión]]
[[fr:Convulsion]]
[[it:Convulsione]]
[[nl:Epileptisch insult]]
[[scn:Cummursioni]]
[[tr:Havale (tıp)]]
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[[Category:Neurology]]
[[Category:Neurology]]
[[Category:Epilepsy]]
[[Category:Epilepsy]]
[[Category:Signs and symptoms]]
[[Category:Emergency medicine]]
[[Category:Emergency medicine]]
[[Category:Mature chapter]]
[[Category:Disease]]
[[Category:Disease]]
[[es:Convulsión]]
[[fr:Convulsion]]

Latest revision as of 03:10, 26 December 2020



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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Shakiba Hassanzadeh, MD[2]

Synonyms and keywords: Fits, convulsions

Overview

Historical Perspective

Classification

Pathophysiology

Causes

Differentiating Seizure from other Diseases

Epidemiology and Demographics

Risk Factors

Screening

Natural History, Complications and Prognosis

Diagnosis

History and Symptoms | Physical Examination | Laboratory Findings | Electroencephalogram | CT | MRI | Other Imaging Findings | Other Diagnostic Studies

Treatment

Medical Therapy | Surgery | Primary Prevention | Secondary Prevention | Cost-Effectiveness of Therapy | Future or Investigational Therapies

Case Studies

Case #1

Related Chapters