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A Transient Ischaemic Attack (TIA), often called a mini-stroke, is a temporary episode of stroke-like symptoms caused by a brief, temporary blockage of blood flow to the brain. Unlike a full stroke, the blockage is short-lived and does not cause permanent damage.
read more about transient ischaemic attack ...The cause is a temporary blockage of an artery in the brain, usually by a small blood clot or debris. This blockage briefly restricts blood flow, leading to localized tissue oxygen deprivation (ischemia). The clot usually dissolves quickly, restoring blood flow before permanent damage occurs. However, it signals a severe underlying risk of a future, full stroke.
Symptoms are stroke-like but fleeting. They include sudden weakness or numbness on one side of the body, difficulty speaking, slurred speech, sudden dizziness, or confusion. The symptoms typically resolve within minutes or an hour.
A TIA frequently impacts eye health, as temporary vision loss is a common symptom. Patients may experience a sudden graying or blacking out of vision in one eye (amaurosis fugax), which clears quickly but signals that an artery to the eye or brain was blocked.
Diagnosis requires immediate testing, even if symptoms have cleared. Tests include imaging (MRI or CT scans), ultrasound of the neck arteries (carotid arteries), and an electrocardiogram to check for heart rhythm problems like atrial fibrillation.
Immediate treatment is important because a TIA is a severe warning sign. Patients who experience a TIA are at a high risk of having a full stroke within the following days or weeks. Treatment focuses on prescribing medication to prevent future clot formation.
No, a TIA is temporary and does not cause permanent brain damage, but it is a strong warning sign of future stroke.
Yes, immediate evaluation is necessary to find the cause and begin preventative treatment.
Yes, temporary vision loss in one eye (amaurosis fugax) can be the sole symptom of a TIA.
If you experience sudden, painless vision loss that feels like a "curtain" coming down, seek emergency care immediately. This "Amaurosis Fugax" is a critical sign of a TIA. Early intervention significantly reduces the 90-day risk of a major stroke.
American Heart Association. TIA (TIA) (heart.org). 2024.
Mayo Clinic. Transient Ischemic Attack (mayoclinic.org). 2024.
AAO. Amaurosis Fugax (aao.org). 2024.
StatPearls. Transient Ischemic Attack (ncbi.nlm.nih.gov). 2024.