Though typically lasting only a few minutes, a Transient Ischemic Attack (TIA), often called a “mini stroke,” can be an early indicator of a potential future, more serious stroke. Experts emphasize that a TIA can serve as a critical warning sign.

What is a TIA?

A TIA occurs when blood flow to the brain is temporarily interrupted, usually by a blood clot or plaque buildup in the arteries. This is often described as a “heart attack of the brain” by Dr. Tom French, a stroke consultant for the National Health Service in Scotland. The blockage often resolves on its own, restoring blood flow and preventing permanent brain damage.

Recognizing the Symptoms

TIA symptoms appear suddenly and can disappear quickly, making them easy to dismiss. However, approximately one-third of US adults have experienced symptoms consistent with a mini stroke, yet only 3% sought medical attention, according to researchers at the American Heart Association.

Common Symptoms Include:

  • Sudden weakness or numbness in the face, arm, or leg
  • Difficulty speaking or understanding speech
  • Vision problems, such as blurred or double vision
  • Loss of balance or coordination
  • Severe headache

“If someone has any of those signs and they were abrupt in onset, I would advise them to go to the nearest emergency room,” stressed Dr. Brandon Giglio, director of vascular neurology at NYU Langone Hospital—Brooklyn. Call 911 immediately if any of these symptoms appear.

Who is at Risk?

At least 240,000 Americans experience a TIA each year, but experts believe the actual number is higher due to underreporting. Without treatment, up to 20% of people who have a TIA will suffer a stroke within 90 days, with half of those strokes occurring within the first two days.

Risk Factors Include:

  • Chronic conditions like high blood pressure, high cholesterol, and diabetes
  • Atrial fibrillation (irregular heartbeat)
  • Sickle cell disease
  • Obesity, smoking, alcohol use, and recreational drug use
  • Family or personal history of stroke or TIA
  • Age (risk increases after 55)
  • Gender (men have a slightly higher risk)

“A TIA can be a blessing in disguise because it sends a warning that something isn’t right, so you can hopefully stop a stroke before it ever happens,” said Dr. Mitchell S.V. Elkind, a professor of neurology and epidemiology at Columbia University.