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Seizures
VM 609 Final
27
Veterinary Medicine
Professional
10/17/2012

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Cards

Term
Seizure Definition
Definition
clinical manifestation of excessive hypersynchronous neuronal activity
Term
Causes of Seizures
Definition
inadequate neuronal inhibition (GABA and glycine)
excessive neuronal excitation (aspartate and glutamate)
or both
Term
Prodrome
Definition
prior to the onset of seizure
increased hiding, attention seeking
Term
Aura
Definition
initial manifestation of the seizure
stereotypical motor, behavioral, or autonomic changes
can last seconds to minutes
Term
Ictal
Definition
actual seizure event
lasts seconds to minutes
Term
Post Ictal
Definition
period after the seizure
can last minutes to days
behavior changes and neurologic symptoms may be seen
Term
Four Components of Seizure
Definition
prodrone
aura
ictal
post ictal
Term
Focal seizures
Definition
not observed clinically
affects one focal point of the brain
Term
Partial seizures
Definition
observed clinically
affects only 1 section of the brain
Term
Generalized seizure
Definition
Tonic: stiff
Clonic: trembling
Myoclonic: rhythmic movements
Simple: no loss of consciousness
Complex: loss of consciousness
Term
Most common type of seizure
Definition
focal with secondary generalization
Term
Epilepsy
Definition
recurrent seizures
2 or more seizures at least 1 month apart
symptom not a disease
Term
Cluster
Definition
2 or more seizures within 24 hours
Term
Status epilepticus
Definition
seizure lasting longer than 5 minutes
or 2 seizures without recovery to consciousness
Term
Genetic Epilepsy
Definition
primary or idiopathic epilepsy
the seizure threshold is lower for that person
common (1-2% of population)
refractory in 25% of cases
affects Australian Shepherd and Border Collies
diagnosis of exclusion
seizures begin between 1-5 years old with normal intericteric periods
Term
Structural-Metabolic Epilepsy
Definition
Intracranial - malformation, hydrocephalus, lissencephaly, cysts, inflammation, trauma, neoplasia, cerebrovascular event, degenerative, storage disease

Extracranial - toxins, hypoglycemia, hypocalcemia, hypoxemia, hepatic, renal, hyperlipidemia, thiamin deficiency
Term
Unknown Epilepsy
Definition
classification where causes is not determined but genetic epilepsy is not likely
Term
Kindling Phenomenon
Definition
Each seizure that a patient has makes it easier for that patient to have another seziures
Term
When Treatment is Required
Definition
known intracranial disease
status epilepticus
3 or more generalized seizures within 24 hours
2 or more cluster episodes within 1 year
2 or more isolated seizures within 6 month period
prolonged ictal events >10 minutes
prolonged severe or unusual postictal evens
Term
Objective of Seizure Control
Definition
decrease frequency duration or intensity by 50%
unrealistic that there will be no seizures
patient may require life-long treatment
need at least 4 week to judge whether or not the medication is effective
at least 6 months to 1 year before decreasing the dose
Term
Go to the ER if
Definition
seizure lasts >5 minutes
3 or more seizures within 24 hour period
Term
Emergency Drug Therapy
Definition
diazepam or levitiracetam
get IV access or do it rectally
start a loading dose
Term
Phenobarbital
Definition
hepatic metabolism
Can see hepatotoxicity
Causes sedation - biggest problem
Anything over 35 mg/mLcan potentially cause hepatotoxicity
Measure levels when the drug reaches a steady state
Measure drug levels in 1-2 weeks after starting
Steady state is 7 half lives
Term
Bromide
Definition
salt
Throw off the salt in the body and competes with Cl-
Has really long half life and can't tweak the medication quickly
Polyphagia leading to pancreatitis
Do not use bromide in cats - causes asthmatic condition
Term
Zonisimide
Definition
Sulfa classication
Neuroprotective effect
Long half life in cats - can get away with once a day dosing
Don't use in breeds that are sensitive to sulfonamides
Competively inhibits phenobarbital
Sedation is transient at the beginning
Term
levitiracetam
Definition
Very quick to work
Anti-kindling effect
Short half life
Sedation is transient at the beginning
Term
Diazepam
Definition
not good for chronic control
Good for emergencies
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