Seizures can be related to stroke, and what evaluation is needed?

• A. Seizures can occur during or after stroke due to brain tissue injury; evaluate with CT/MRI to identify infarct/hemorrhage and manage underlying cause.
• B. Stroke never causes seizures; evaluate with EEG only.
• C. Seizures always precede a stroke; no imaging needed.
• D. Stroke evaluation requires only carotid ultrasound.

Answer: (A)

Seizures associated with stroke occur because injured brain tissue irritates neurons, so when a seizure happens in the context of suspected stroke, the priority is to determine the presence and type of brain injury. The appropriate evaluation is brain imaging with CT or MRI to identify whether there is an infarct or a hemorrhage and to guide the underlying treatment. A head CT is usually done first to quickly distinguish hemorrhagic from ischemic stroke and rule out other emergencies; MRI offers greater sensitivity for detecting early ischemic changes and cortical involvement if the CT is not definitive. This imaging drives decisions about reperfusion therapies for ischemic stroke or specific management for hemorrhagic stroke, and it also informs how to address the seizure aspect. EEG can be helpful if seizures occur to characterize the event, but it does not replace imaging in diagnosing stroke. Carotid ultrasound alone does not assess the brain injury itself and is not sufficient for evaluating stroke in this context.