What is a silent stroke?

Written by Editorial Team | Last Updated: August 2026

A silent stroke is a type of cerebrovascular event where a blood clot temporarily blocks an artery supplying blood to a portion of the brain, causing localized tissue damage without triggering the classic, dramatic physical symptoms of a traditional stroke, such as sudden facial drooping, severe paralysis, or acute speech impairment. Because these micro-strokes produce no immediate, recognizable warning signs, patients and physicians typically discover them entirely by accident years later while reviewing brain imaging scans performed for unrelated medical evaluations. Despite being labeled silent, cumulative silent strokes can progressively impair cognitive function and memory.

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