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Juvenile myoclonic epilepsy: diagnosis, management and outcome
1Epilepsy Unit, Westmead Hospital, Sydney, NSW.
Insights
Juvenile myoclonic epilepsy is often diagnosed late. Sodium valproate effectively controls seizures in most patients, but lamotrigine is a suitable alternative if side effects arise.
Area of Science:
- Neurology
- Epileptology
Background:
- Juvenile myoclonic epilepsy (JME) is a common epilepsy syndrome.
- Diagnosis is often delayed due to unrecognized symptoms like early-morning myoclonus.
Purpose of the Study:
- To investigate diagnostic delays in JME.
- To assess seizure control, triggers, and medication efficacy and side effects.
- To identify optimal treatments for JME.
Main Methods:
- Interviews with patients and review of clinical records.
- Study conducted on 36 patients at a tertiary referral epilepsy clinic.
Main Results:
- Significant diagnostic delays were observed, with early-morning myoclonus often overlooked.
- Sodium valproate achieved complete seizure control in 63% of patients.
- Provoked seizures were common in poorly controlled cases, highlighting lifestyle importance.
- Weight gain was a notable side effect of sodium valproate; lamotrigine emerged as an alternative.
Conclusions:
- JME is under-recognized but treatable with sodium valproate.
- Lamotrigine is a viable alternative when sodium valproate causes side effects.
Objectives:
To study delay in diagnosis, seizure control, seizure-provoking factors, suitable medications and drug side effects in patients with juvenile myoclonic epilepsy.
Design:
Telephone and personal interview of patients and review of their clinical notes.
Participants And Setting:
Thirty-six patients attending an epilepsy clinic at a tertiary referral hospital.
Results:
There was a substantial delay in the diagnosis of juvenile myoclonic epilepsy because the symptom of early-morning myoclonus was not specifically sought. Sodium valproate is the drug of choice, producing absolute seizure control in 63% of cases (19/30). Most patients with poor seizure control had provoked seizures only, emphasising the importance of lifestyle in management. Half of the patients taking sodium valproate experienced side effects, such as weight gain. Lamotrigine is the most suitable alternative.
Conclusions:
Juvenile myoclonic epilepsy is a common, under-recognised form of epilepsy which is best treated with sodium valproate. If side effects occur, lamotrigine should be used.