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50 Cards in this Set
- Front
- Back
tonic clonic seizures duration
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1 min or less
freeze - flex, then extend, tonic CRY then tremor |
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cause of tonic clonic seizure
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metabolic or toxic
|
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when to take seizure to the hospital
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status epilepticus (prolonged)
pregnant diabetic (hypoglycemia) multiple, repeated seizures with LOC can go later for: injured FIRST seizure |
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know the toxic metabolic causes for seizures
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HYPOGLYCEMIA
Na, Ca, Mg stimulant or proconvulsant sedative withdrawal SLEEP DEPRIVATION if you really suspect infection: LP then after you have ruled these out: EEG, MRI |
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Posterior rhythm:
where? when? |
- occipital region, need HIGH voltage
- eyes closed and not focusing on much |
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when do you see epileptiform discharges?
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INTERictally
focal = partial - only one node is firing diffuse = generalized |
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what are waves during seizures called?
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focal epileptic seizures
or generalized.. |
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aura v prodrome: duration
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aura- mins
pro- hours to days |
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aura v prodrome: which type of seizure
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aura: partial complex only
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simple v complex partial seizures
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complex have LOC
|
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auras in temporal lobe partial complex seizures
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- viscerosensory
- experiential - auditory have the same aura each time |
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EEG for diagnosis of epilepsy
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interictal = only gets 50% of them
More sensitive: sleep deprivation, longer time of recording |
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gold std for diagnosis
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VIDEO telemetry + EEG
|
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Seizure 5 year recurrence if untreated
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50%
|
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When do you treat a first seizure-- when they have an INCREASED risk of relapse
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- EEG abnormal
- abnormal imaging - FOCAL neuro deficit - Fhx |
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lifestyle modifications
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SLEEP
reduce stress DIET alcohol, stimulants |
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DRUGS for partial epilepsy
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all are approved
Best tolerated: Phenytoin, CBZ Best control of seizures: CBZ |
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Drugs for generalized epilepsy
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Valproate
this is as good as CBZ, but CBZ may be better tolerated |
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Name the old epilepsy drugs
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Valproate
CBZ phenytoin PB primidone |
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Name the new epilepsy drugs
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Gabapentin
topiramate lamotrigine |
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Generalized seizures
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VALPROATE
- more effective than lamotrigine - better tolerated than either topi or lamo use this first for gen epilepsy |
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What is up with the new antiepileptics?
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- not as effective as old drugs
- MOre tolerable than older drugs but: much more expensive |
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Contraindications: Phenytoin
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generalized seizures
|
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Contraindications: CBZ
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JME is made worse
|
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Contraindications: valproate
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not during pregnancy
women of childbearing age |
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which drugs are highly protein bound?
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Valproate
Phenytoin |
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Which drugs induce metabolism of other drugs
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CBZ, Phenytoin, phenobarb
|
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Which drugs inhibit metabolism of other drugs
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Valproate
|
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Phenytoin ISSUES?
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- LONG half life = 4-5 days
ZERO order kinetics at high doses |
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CBZ things to think about:
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AUTOINDUCTION - you will need to start a dose and then step it up slowly
- ELDERLY: will have a longer half life so start them LOWER |
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CBZ side effects
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rash
|
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Valproate side effects
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hair loss
Gain weight tremor dont give to women in CHILDBEARING years |
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Of none of the old drugs work, which is the cleanest NEW DRUG on your metabolism?
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- GABAPENTIN
this is NOT the same as phenobarbital. PLEASE DONT CONFUSE THEM |
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gabapentin profile: PK
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not metab by liver,
not changed by kidney NOT bound to protein DOES not mess with other drugs!! |
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Topiramate issues
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word finding difficulties
kids will be at lower grade level! |
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primidone side effect
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libido decreased
|
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Phenytoin side effects
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dysmorphic issues ( bossing)
GI |
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phenobarbital: NOT GABAPENTIN
good things |
less motor issues
less GI disturbances |
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use of the MRI
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tells you if there is a structural lesion -- WORSE outcome
|
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Causes of recent onset epilepsy
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MRI: gadolinium enhancing tumor
- tumor infection inflammation |
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MRI finding on CHRONIC epilepsy
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Benign tumor
AVM Neuronal abnormalities or gliosis Mesial Temporal Sclerosis |
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Describe the typical tumor that causes epilepsy
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- SMALL
slow growing near the cortex Sharp borders and not much edema Not much contrast |
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DNET: location
Type of seizures it causes |
temporal lobe
partial complex |
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Vascular causes of CHRONIC epilepsy
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AVM
cavernous malformation |
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3 stages of neuronal development that can be messed up in seizures
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1) proliferation
2) migration 3) organization |
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which of these is messed up in Focal cortical dysplasia
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Organization
|
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problem with periventricular heterotopia
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MIGRATION
- periventricular neurons take over the brain surface |
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which is the best MRI sequence for SEIZURE imaging?
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FLAIR
- better matched with EEG |
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When do you start thinking about SURGERY
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after 3 tries with drugs?
Medically refractory - FOCAL lesion that you could target |
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examples of tumors that would be good for surgery = medically refractory
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DNET
Mesial temporal sclerosis |