diagnosis and treatment of epilepsy
DESCRIPTION
Diagnosis and Treatment of Epilepsy. Marcelo E. Lancman, M.D. Director, Epilepsy Program NEREG. Comprehensive Epilepsy Center. Referrals. Evaluation: ●History/Exam ●EEG ●Imaging. Controlled. Not Controlled. Video-EEG. Epilepsy. Non-epileptic Events. Refer. Medical Management. - PowerPoint PPT PresentationTRANSCRIPT
Diagnosis and Treatment of Diagnosis and Treatment of EpilepsyEpilepsy
Marcelo E. Lancman, M.D.Marcelo E. Lancman, M.D.Director, Epilepsy ProgramDirector, Epilepsy Program
NEREGNEREG
ReferralsComprehensive
EpilepsyCenter
Evaluation:●History/Exam
●EEG●Imaging
Controlled Not Controlled
Video-EEG
Non-epilepticEvents
Epilepsy
MedicalManagement
SurgicalManagementRefer
Epilepsy and SeizuresEpilepsy and Seizures
What is epilepsy?What is epilepsy?
What is a seizure?What is a seizure?
IncidenceIncidence
EpilepsyEpilepsy
0.5-1% 0.5-1%
SeizuresSeizures
5-10%5-10%
ClassificationClassification
PartialPartialSimpleSimpleComplexComplex
GeneralizedGeneralizedAbsenceAbsenceAtonicAtonicClonicClonicTonicTonicTonic-clonicTonic-clonicMyoclonicMyoclonic
Evaluation…A Team Evaluation…A Team ApproachApproach Initial intake by epileptologist Initial intake by epileptologist
– Patient/family historyPatient/family history– Physical examPhysical exam– Review of recordsReview of records
Plan to include…Plan to include…
Testing Testing – EEG, labsEEG, labs
ImagingImaging– MRI, CTMRI, CT
Diagnosis and ControlDiagnosis and Control
Diagnosis is clearDiagnosis is clear
Patient placed on anti-epileptic drug Patient placed on anti-epileptic drug appropriate for type of epilepsyappropriate for type of epilepsy
The Poorly Controlled, The Poorly Controlled, Intractable Seizure PatientIntractable Seizure Patient
Despite medical management, patient Despite medical management, patient continues to have frequent, debilitating continues to have frequent, debilitating seizuresseizures
Commonly on polytherapy (more than one Commonly on polytherapy (more than one medication)medication)
Video-EEG MonitoringVideo-EEG Monitoring
Continuous EEG monitoring along with Continuous EEG monitoring along with continuous audio-video tapingcontinuous audio-video taping
Requires inpatient admissionRequires inpatient admission
Goals of Video-EEG Goals of Video-EEG MonitoringMonitoring Epilepsy vs. non-Epilepsy vs. non-
epileptic eventsepileptic events
Characterize epilepsy Characterize epilepsy typetype
Pre-surgical Pre-surgical evaluation evaluation
Non-Epileptic Events Non-Epileptic Events
20 to 30% of patients referred with 20 to 30% of patients referred with diagnosis of intractable epilepsydiagnosis of intractable epilepsy
Events that do not have electrical source in Events that do not have electrical source in brainbrain
May have physical or psychological May have physical or psychological causes that are not epilepsycauses that are not epilepsy
But CAN also occur in patients who have But CAN also occur in patients who have epilepsyepilepsy
Non-epileptic eventsNon-epileptic events
Physiologic (other medical conditions)Physiologic (other medical conditions)– Referred to other medical specialistReferred to other medical specialist
Psychological or pseudoseizuresPsychological or pseudoseizures– Referred to psychiatry and neuropsychologist Referred to psychiatry and neuropsychologist
who work with this type of stress-seizurewho work with this type of stress-seizure– Psychiatric medication, psychotherapy, Psychiatric medication, psychotherapy,
educationeducation
Brief history of epilepsy Brief history of epilepsy treatmenttreatment 1912: phenobarbital1912: phenobarbital 1924: EEG began to be used1924: EEG began to be used All of the treatments we will discuss today All of the treatments we will discuss today
have only come about in the last 80 yearshave only come about in the last 80 years
MedicationsMedications Choices based on epilepsy type, patient profile, side Choices based on epilepsy type, patient profile, side
effect profile, costeffect profile, cost
Best to have patient on single antiepileptic drug (AED)Best to have patient on single antiepileptic drug (AED)
May need polytherapy (combination of medications)May need polytherapy (combination of medications)
Adding meds requires going up slowly with the new Adding meds requires going up slowly with the new agent before discontinuing previous drugagent before discontinuing previous drug
Polytherapy requires deep knowledge of interactionsPolytherapy requires deep knowledge of interactions
““Old Reliables”Old Reliables”
Carbamazepine Carbamazepine (Tegretol)(Tegretol)
PhenobarbitalPhenobarbital
Ethosuximide (Zarontin)Ethosuximide (Zarontin)
Phenytoin Phenytoin (Dilantin/Cerebyx)(Dilantin/Cerebyx)
Valproic acid (Depakote)Valproic acid (Depakote)
Primidone (Mysoline)Primidone (Mysoline)
Newer AED’sNewer AED’s
Gabapentin (Neurontin)Gabapentin (Neurontin)
Lamotrigine (Lamictal)Lamotrigine (Lamictal)
Topiramate (Topamax)Topiramate (Topamax)
Felbamate (Felbatol)Felbamate (Felbatol)
Diastat (Diazepam)Diastat (Diazepam)
Tiagabine (Gabitril)Tiagabine (Gabitril)
Pregabalin (Lyrica)Pregabalin (Lyrica)
Zonisamide (Zonegran)Zonisamide (Zonegran)
Levetiracetam (Keppra)Levetiracetam (Keppra)
Oxcarbazepine (Trileptal)Oxcarbazepine (Trileptal)
Rufinamide (Banzel)Rufinamide (Banzel)
Medication choices based on Medication choices based on epilepsy type…epilepsy type…
AED’s for Partial EpilepsyAED’s for Partial Epilepsy
TegretolTegretol DilantinDilantin DepakoteDepakote NeurontinNeurontin LamictalLamictal PhenobarbitalPhenobarbital PregabalinPregabalin
KeppraKeppra TopamaxTopamax GabitrilGabitril ZonegranZonegran TrileptalTrileptal MysolineMysoline
Best AED’s for Generalized Best AED’s for Generalized EpilepsyEpilepsy DepakoteDepakote LamictalLamictal Topamax Topamax ZonegranZonegran KeppraKeppra RufinamideRufinamide
How to use polytherapy How to use polytherapy rationallyrationally Pharmacodynamics Pharmacodynamics
(what the medication does to the body)(what the medication does to the body)
Pharmacokinetics Pharmacokinetics (what the body does to the (what the body does to the
medications)medications)– AbsorptionAbsorption– Distribution Distribution – EliminationElimination
Half lifeHalf life LiverLiver KidneysKidneys
How to use polytherapy How to use polytherapy rationallyrationally Side effectsSide effects
– Dose-related Dose-related
– Idiosyncratic (each Idiosyncratic (each person is different)person is different)
For patients that do not For patients that do not respond to medicationrespond to medication Ketogenic dietKetogenic diet Vagus nerve stimulatorVagus nerve stimulator Epilepsy surgeryEpilepsy surgery
Ketogenic Diet (@1920)Ketogenic Diet (@1920)
High fat, low carbohydrate/protein dietHigh fat, low carbohydrate/protein diet Requires hospitalization to start itRequires hospitalization to start it
– NPO until patient in ketosisNPO until patient in ketosis– Parent educationParent education– Meds to be taken into accountMeds to be taken into account
Recommended mainly for young children Recommended mainly for young children due to compliance and efficacy due to compliance and efficacy
Epilepsy SurgeryEpilepsy Surgery
The goals are:The goals are:
– To determine where the seizures are coming To determine where the seizures are coming fromfrom
– To make sure is safeTo make sure is safe
Epilepsy SurgeryEpilepsy Surgery
To determine where the seizures are To determine where the seizures are coming fromcoming fromVideo-EEG monitoringVideo-EEG monitoringMRIMRIMRSMRS: : PETPET: : SPECTSPECT: :
EEG Slide
99-10-31/ROUTINE
Fp1-F7
F7-FT9
FT9-T7
T7-P7
P7-O1
Fp2-F8
F8-FT0
FT0-T8
T8-P8
P8-O2
FT9-FT0
A1-A2
Fp1-F3
F3-C3
C3-P3
P3-O1
Fp2-F4
F4-C4
C4-P4
P4-O2
ECG-RFECG-RF
SaO2(%)
HR(bpm)
Comment
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
spike
Fp1-F7
F7-FT9
FT9-T7
T7-P7
P7-O1
Fp2-F8
F8-FT0
FT0-T8
T8-P8
P8-O2
FT9-FT0
A1-A2
Fp1-F3
F3-C3
C3-P3
P3-O1
Fp2-F4
F4-C4
C4-P4
P4-O2
ECG-RF
SaO2(%)
HR(bpm)
Comment
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Epilepsy SurgeryEpilepsy Surgery
To make sure that it is safeTo make sure that it is safeWada testWada test: to study speech and memory: to study speech and memoryNeuropsychological testingNeuropsychological testing: mental functions : mental functions
(IQ, memory, attention) and personality (IQ, memory, attention) and personality assessment assessment
Psychological evaluationPsychological evaluationOphthalmologic evaluationOphthalmologic evaluation
Epilepsy SurgeryEpilepsy Surgery
Some cases in which the localization is not Some cases in which the localization is not clear or where function could be affected clear or where function could be affected will require INVASIVE ELECTRODESwill require INVASIVE ELECTRODES
– Depth electrodesDepth electrodes– Subdural electrodesSubdural electrodes
Types of Epilepsy SurgeryTypes of Epilepsy Surgery
Temporal LobectomyTemporal Lobectomy Extratemporal Extratemporal
ResectionsResections HemispherectomyHemispherectomy Corpus CallosotomyCorpus Callosotomy
Outcome after epilepsy Outcome after epilepsy surgerysurgery Anterior temporal lobectomyAnterior temporal lobectomy
– 70-80% seizure free70-80% seizure free Neocortical resectionNeocortical resection
– With lesion: 50-80% seizure freeWith lesion: 50-80% seizure free– Without lesion: 30-50% seizure freeWithout lesion: 30-50% seizure free
HemispherectomyHemispherectomy– Significant improvementSignificant improvement
Corpus CallosotomyCorpus Callosotomy– Significant improvement for drop attacksSignificant improvement for drop attacks
Complications of surgeryComplications of surgery
Low rate of Low rate of complicationscomplications– InfectionsInfections– BleedingBleeding– AnesthesiaAnesthesia– Function Function
Vagus Nerve Stimulator Vagus Nerve Stimulator (1997)(1997) Intractable epilepsy patient without focus or Intractable epilepsy patient without focus or
desires interim step before epilepsy surgerydesires interim step before epilepsy surgery Goal is to reduce amount/severity of seizures vs. Goal is to reduce amount/severity of seizures vs.
curecure Device surgically implanted in left chest/axilla Device surgically implanted in left chest/axilla
areaarea Coils around left vagus nerveCoils around left vagus nerve Stimulation is automatic; patient can additionally Stimulation is automatic; patient can additionally
stimulate device if aura stimulate device if aura
SummarySummary
Ways to treat epilepsyWays to treat epilepsy– MedicationsMedications– Ketogenic DietKetogenic Diet– SurgerySurgery– Vagus nerve stimulatorVagus nerve stimulator