# Electroconvulsive therapy for an older patient with schizophrenia complicated by nonconvulsive status epilepticus during catatonia: A case report

## TL;DR

A 77-year-old woman with schizophrenia developed a condition involving both nonconvulsive status epilepticus and catatonia, which was successfully treated with electroconvulsive therapy.

## Contribution

This case report highlights the rare coexistence of NCSE and catatonia in schizophrenia and demonstrates the effectiveness of ECT in treating the condition.

## Key findings

- Stupor can result from both NCSE and catatonia associated with schizophrenia.
- ECT was effective in treating catatonia associated with schizophrenia complicated by NCSE.
- When NCSE symptoms persist despite EEG improvement, coexisting catatonia should be considered.

## Abstract

Nonconvulsive status epilepticus (NCSE) can present with symptoms resembling catatonia, such as stupor, staring, and immobility. Distinguishing between the two conditions using electroencephalography (EEG) is crucial. However, reports of NCSE coexisting with catatonia are rare.

We present a case of catatonia associated with schizophrenia complicated by NCSE. A 77‐year‐old woman with a 30‐year history of well‐controlled schizophrenia developed stupor and was admitted to our hospital. EEG revealed evolving spike‐and‐wave complexes, leading to a diagnosis of NCSE. Administration of levetiracetam improved the EEG findings, and subsequent monitoring confirmed resolution of epileptiform activity. However, the patient's stuporous state persisted despite the normalized EEG. Extensive workup showed no evidence of encephalitis or other neurological pathology. We diagnosed her with NCSE and catatonia associated with schizophrenia. Electroconvulsive therapy (ECT) was administered, resulting in complete resolution of the catatonic symptoms.

This case highlights three key points. First, stupor can result from both NCSE and catatonia associated with schizophrenia. Second, when no physical cause for NCSE is identified and symptoms persist despite EEG improvement following antiepileptic treatment, coexisting catatonia associated with schizophrenia should be considered. Finally, ECT was effective in treating catatonia associated with schizophrenia complicated by NCSE. In patients presenting with stupor, it is important to differentiate between NCSE and catatonia associated with schizophrenia and to recognize the potential for their coexistence.