The single most informative source in a first-seizure assessment is not the patient, who was unconscious for the part that matters. It is whoever watched. If nobody took a phone number from the witness in the emergency department, the diagnosis is being made on a fragment.
Ring them. Ask for a narrative, not a checklist: what was the patient doing immediately before, what was the first thing that looked wrong, was there a cry, were the eyes open or shut, how long until they spoke again, and were they confused afterwards or immediately themselves. Eyes closed throughout and preserved responsiveness point away from an epileptic seizure; a period of post-event confusion lasting minutes points towards one. Ask whether anyone recorded video — increasingly someone did, and thirty seconds of footage settles questions that an hour of history cannot.
Then ask the patient about the things a witness cannot see: déjà vu, a rising epigastric sensation, an unusual smell, jerks on waking over the preceding months. Myoclonic jerks in the morning, dismissed for years as clumsiness, are the commonest missed lead in juvenile myoclonic epilepsy — and the diagnosis changes both the drug and the prognosis.
- Take the witness's telephone number before they leave, and call if you did not speak to them
- Ask for a narrative of the event, not a yes-or-no symptom list
- Ask specifically whether anyone filmed it
- Ask every first-seizure patient about morning jerks, déjà vu and rising epigastric sensations
- Record the duration of post-event confusion — it separates seizure from syncope more reliably than the movements do
Why it matters
Most first-seizure misdiagnosis traces back to a history taken only from the person who cannot remember the event.
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