Ch 5 Epilepsy Flashcards Preview

Dr. Cheng neuro review Qs > Ch 5 Epilepsy > Flashcards

Flashcards in Ch 5 Epilepsy Deck (32)
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1

The prevalence of congenital malformations in offspring of women on an AED is?

4-10% which is 2-4x increase from the expected prevalence of the general population

2

Which AED has lower risk of teratogencity and should be considered to use during pregnancy?

Lamotrigine

3

How are lamotrigine levels affected during pregnancy?

The clearance of lamotrigine increases during pregnancy, so the dose should be adjusted during this time

4

Which AED has some of the highest fetal malformation rates and should be avoided during pregnancy?

Valproate (2-3x higher than carbamazepine or lamotrigine)
It also has dose dependent cognitive adverse events

5

What is the fencer's posture associated with?

Frontal lobe epilepsy and indicates epileptic activation of the supplemental motor area

6

Which AED can worsen generalized epilepsy (especially myoclonic epilepsy)?

Gabapentin

7

Which AED has he least potential interactions with any other medication?

Gabapentin (it's neither an enzyme inducer nor inhibitor)

8

In cases of epilepsy of childhood that is refractory to multiple AEDs, what is the next step?

the ketogenic diet (initiated in the hospital by starvation for 1-2 days followed by strict diet)

9

Define simple febrile seizure (6)?

< 15 mins, generalized seizure, lack of focality, normal neuro exam, no persistent deficits, negative family history

10

Define complex febrile seizure (6)?

> 15 mins, focal features, abnormal neuro exam, seizure recurrence in < 24 hours, postictal sign (Todd's paralysis), more likely due to meningitis/encephalitis or underlying seizure d/o

11

How to treat simple febrile seizure?

supportive care

12

How to treat complex febrile seizure?

short term ppx: diazepam and antipyretics
long term ppx: phenobarbital or valproic acid

13

What is generalized epilepsy with febrile seizure plus (GEFS+)?

patients in whom febrile seizures continue past the defined upper limit of age (febrile seizures occur 6mo to 5 yrs old)

14

What is the mutation of GEFS+?

SCN1A

15

What is Rasmussen's syndrome?

Severe inflammatory brain d/o characterized by progressive unilateral hemisphereic atrophy, progressive neurologic dysfunction (hemiparesis and cognitive deterioration), intractable focal seizures (epilepsia partialis continua).

16

What is the treatment of Rasmussen's syndrome?

heispherectomy

17

What are the first line and second line therapies for progressive myoclonic epilepsies?

1st line: Valproic acid (caution: pt with mitochondrial mutation may develop fulminant hepatic failure while on valproic acid)
2nd line: Clonazepam, Levetiracetam, Topiramate, Zonisamide

18

What is the advantage of fosphenytoin over phenytoin (4)?

Compared to phenytoin, fosphenytoin is (1) not associated w purple glove syndrome (2) can be given rapidly IV (3) lower occurrence of cardiovasc side effects (4) can be given IM

19

Common side effects of phenytoin (3)?

dizziness, nystagmus, drowsiness

20

What AEDs are known to exacerbate some myoclonic epilepsies?

Lamotrigine, Gabapentin, Carbamazepine, Pregabalin, and Vigabatrin

21

Out of the following, name which medications are hepatic enzyme inducers and which are hepatic enzyme inhibitors: phenytoin, carbamazepine, valproic acid, phenobarbital, primidone

hepatic enzyme inhibitor: valproic acid
hepatic enzyme inducers: phenytoin, carbamazepine, phenobarbital, primidone

22

what are the main first line and second line agents in the treatment of absence seizures?

First line: ethosuximide
2nd line: valproic acid, topiramate, zonisamide and lamotrigine (although lamotrigine can actually cause aggravation of absence seizures on rare occasions)

23

The adult pattern of normal posterior dominant alpha rhythm in older children and adults is usually seen by the age of?

8 to 10 years

24

In a patient with HSV encephalitis, what abnormality could you expect to find on EEG?

PLEDs (periodic lateralizing epileptiform discharges). Can also be seen in any destructive process such as anoxia, HSV encephalitis, stroke, and tumor

25

Which AEDs have been associated with aggravation of absense seizures (4)?

phenytoin, carbamazepine, gabapentin, lamotrigine

26

Which AEDs have minimal oral contraceptive interaction (7)?

Valproic acid, Gabapentin, Pregabalin, Levetiracetam, Zonisamide, Tigabine, and Topiramate

27

What does the EEG show for JME?

4-6Hz polyspike and wave discharges interictally (can be triggered by photicstimulaton

28

1st line treatment of JME?

Valproic acid
avoidance of triggers such as alcohol intake and lack of sleep

29

2nd line treatment of JME?

lamotrigine, levetiracetam, topiramate, and zonisamide

30

What AEDs to avoid in JME because it can make JME worse?

carbamazepine and phenytoin (similar to the worsening of childhood absence epilepsy seen with these agents)