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Embolic Stroke of Undetermined Source (ESUS) Criteria

All criteria required for ESUS classification (teaching).

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All must be present:

Non-lacunar ischemic stroke on imaging Absence of extracranial or intracranial atherosclerosis causing stroke No major-risk cardioembolic source (e.g. AF, mechanical valve) No other specific stroke etiology identified Workup completed per institutional protocol Age ≥18 years

ESUS checklist

How it works

ESUS defines embolic stroke after negative etiologic workup.

Limits

Requires complete stroke evaluation including prolonged cardiac monitoring.

Educational tool only—not for diagnosis or treatment decisions.

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