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Communication Dans Un Congrès Année : 2020

Epilepsy in early onset Alzheimer’s disease

Résumé

Background: Epilepsy seems to be an important comorbidity in patients with Alzheimer’s disease (AD), especially in young onset AD (<65 years old). At this time epileptic seizures are still underestimated in this population. However, seizures may interact with AD evolution with possible acceleration of cognitive decline and early institutionalization. Seizures may also be a marker of a more aggressive subtype of AD. This study aims to determine the prevalence of the epileptic comorbidity in patients with early onset AD. Secondly, it will investigate the temporal relationship between AD and epilepsy and extract specific characteristics of AD patients at higher risk of epilepsy. Method: All patients diagnosed as early-onset Alzheimer disease between 2013 and 2019, with abnormal CSF biomarkers for Alzheimer disease, and followed at the Universitary Hospital of Nancy (AD regional center) were selected. Patients with cortical focal lesion or old history of epilepsy were excluded. The usual clinical follow-up was extended with a prolonged EEG and a specific consultation with an epilepsy expert. Based on this dedicated interrogation and EEG results, patients were then classified as epileptic or non-epileptic. We collected demographic data and information on epilepsy and AD disorders. Result: Among the 22 included patients, 10 were classified as epileptic with a prevalence of 45%. Considering seizure types, patients presented generalized seizures (n=4), typical temporal seizures (n=4), myoclonus (n=1) and extratemporal seizures (n=1). EEG recordings were not useful in our population. Epileptic patients presented a more severe cognitive decline than patients without seizures (MMSE 8.4+/-6.9 versus MMSE non epileptic 20.9 +/- 5.45). 100% of patients with a MMSE <10 had epileptic comorbidity. In our population, epilepsy never occurred before AD diagnosis. Conclusion: Epilepsy appears to be a frequent comorbidity in early onset AD patients, with a prevalence of 45% in our study. This comorbidity seems to be a marker for severe AD. The role of the epileptic disorder in the acceleration of cognitive decline as the positive impact of antiepileptic drugs still need to be determined.
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Dates et versions

hal-02931238 , version 1 (05-09-2020)

Identifiants

  • HAL Id : hal-02931238 , version 1

Citer

Sarah Haoudy, Thérèse Jonveaux, Olivier Aron, Salomé Puisieux, Lucie Hopes, et al.. Epilepsy in early onset Alzheimer’s disease. Alzheimer's Association International Conference, AAIC 2020, Jul 2020, Virtual Event, United States. ⟨hal-02931238⟩
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