Silent Stroke

Man holding his finger to his lips to silence someone

You could have a stroke and not know it. It’s called silent cerebral infarction (SCI), or “silent stroke.”

Silent stroke is likely caused by a blood clot that interrupts blood flow in the brain. It’s a risk factor for future strokes and a sign of progressive brain damage.

Other conditions are related to SCI:

  • Atrial fibrillation, the most common form of irregular heartbeat in people older than 65, increases the risk of SCI more than two-fold. Risk factors for silent stroke are also risk factors for AF.
  • High systolic blood pressure, hypertension and elevated levels of blood homocysteine are risk factors for SCI. So early diagnosis and prevention of hypertension are important steps to prevent silent stroke.

Together to End Stroke®

Together is how we work — the AHA/ASA, healthcare professionals, stroke survivors, caregivers, sponsors, supporters and caring individuals. To End Stroke is what we're striving for.