A mini stroke, known medically as a transient ischemic attack (TIA), is a medical emergency that requires an immediate 911 call, even if symptoms fade within minutes. Up to 80% of full strokes that follow a TIA are preventable with fast treatment, making the hours after a mini stroke the single best window to protect your brain. About 1 in 20 people who have a TIA will suffer a full stroke within a week if they don’t get care.
Call 911 Immediately
The most important thing to do for a mini stroke is call 911 the moment symptoms appear. Do not wait to see if they go away on their own, and do not drive yourself to the hospital. Even if the symptoms resolve completely after a few minutes, you still need emergency evaluation. There is no way to tell at home whether you’re having a TIA or a full stroke, and every minute matters.
If you’ve already had a TIA in the past and any of the symptoms return, call 911 again. A second event carries even higher risk.
How to Recognize the Symptoms
TIA symptoms come on suddenly and mirror the early signs of a full stroke. Most episodes last only a few minutes, and nearly all resolve within an hour, though symptoms can occasionally persist for up to 24 hours. The key difference from a full stroke is that a TIA doesn’t cause permanent brain damage because the blood clot clears on its own. But you cannot know that in the moment.
Watch for these warning signs:
- Weakness or numbness in the face, arm, or leg, usually on one side of the body
- Slurred speech or difficulty understanding what others are saying
- Vision changes, including blindness in one or both eyes or double vision
- Loss of balance or coordination, dizziness
- Facial drooping, especially on one side
If you notice any combination of these, act immediately. The fact that symptoms disappear does not mean the danger has passed.
What Happens at the Hospital
In the emergency department, the priority is figuring out whether you’ve had a TIA or a full stroke and identifying what caused it. The first test is typically a CT scan of the brain, which can quickly rule out bleeding or a completed stroke. Many hospitals also perform a CT angiogram at the same time to look at the blood vessels in your neck and brain for blockages or narrowing.
Doctors use a scoring system called ABCD2 to estimate your risk of having a full stroke in the days ahead. It factors in your age, blood pressure at the time of evaluation, whether you had weakness or speech problems, how long your symptoms lasted, and whether you have diabetes. A score below 4 is considered lower risk, 4 to 5 is moderate, and above 5 is high risk. This score helps determine whether you need to be admitted to the hospital for observation or can be safely followed up as an outpatient.
The speed of the evaluation matters more than where it happens. What’s critical is that the workup begins quickly, ideally within 24 hours of the event.
Finding the Underlying Cause
A TIA is a symptom, not a diagnosis. Something caused a temporary blockage in blood flow to your brain, and finding that cause is how doctors prevent a full stroke. The most common culprits include narrowing of the carotid arteries in the neck (from plaque buildup), an irregular heart rhythm called atrial fibrillation that allows blood clots to form in the heart, and disease in the small blood vessels deep inside the brain.
Your workup will likely include heart monitoring to check for irregular rhythms, imaging of the carotid arteries, and blood tests to check cholesterol, blood sugar, and clotting factors. Each of these results shapes the treatment plan that follows.
Medications After a TIA
Most people who have a TIA will be started on blood-thinning medication to reduce the chance of another clot. The specific type depends on the cause. If atrial fibrillation is found, you’ll typically be placed on an anticoagulant. If the cause is arterial plaque or small vessel disease, antiplatelet medications are the standard approach.
In certain high-risk cases, particularly when a TIA is caught very early, doctors may prescribe a short course of two antiplatelet medications together. This dual therapy is not used long-term because the bleeding risk increases over time, but in the first few weeks it can significantly lower the chance of a follow-up stroke.
You may also be started on a cholesterol-lowering medication and a blood pressure medication if your levels are above target. These aren’t optional extras. They’re core parts of stroke prevention.
When Surgery Is Needed
If imaging reveals that the carotid artery on the same side as your TIA is 50% or more blocked, a procedure to open or bypass that narrowing is typically recommended. The most common approach is carotid endarterectomy, a surgery that physically removes the plaque from inside the artery. For patients who aren’t good surgical candidates due to other health conditions, prior neck radiation, or anatomy that makes surgery difficult, a stent can be placed inside the artery instead.
Timing matters here too. The benefit of these procedures is greatest when they’re performed shortly after the TIA, before a full stroke has the chance to occur. Patients with less than 50% narrowing generally don’t benefit from surgery and are managed with medication alone.
Blood Pressure and Lifestyle Changes
High blood pressure is the single largest modifiable risk factor for stroke. Current guidelines recommend keeping blood pressure below 130/80 mmHg after a TIA, which is tighter than the older standard of 140/90. Hitting this lower target has been shown to significantly reduce the risk of a recurrent stroke compared to the more lenient goal. For people with severe narrowing of major brain arteries, doctors sometimes aim for the more cautious 140/90 target to avoid dropping blood pressure too aggressively.
Beyond medication, the lifestyle adjustments that matter most are the ones that directly lower stroke risk:
- Quit smoking, which damages artery walls and accelerates plaque buildup
- Reduce sodium intake to help control blood pressure
- Exercise regularly, aiming for at least 150 minutes of moderate activity per week
- Manage blood sugar if you have diabetes, since diabetes roughly doubles stroke risk
- Limit alcohol, which raises blood pressure and can trigger atrial fibrillation
These aren’t vague wellness suggestions. Each one directly targets a mechanism that causes strokes.
The Risk Window After a TIA
The days immediately following a TIA are the most dangerous. In one large population study, 2.5% of TIA patients had a full stroke within 48 hours. By 7 days, that number rose to 5.6%, and by 90 days it reached 11.2%. These numbers come from an era before the most aggressive early treatment protocols were widely adopted, and fast intervention can dramatically cut that risk. But the statistics make the urgency clear: a TIA is not a false alarm. It’s a warning that the next event could cause permanent damage.
If you’ve had a TIA and were treated in the emergency department, make sure you attend every follow-up appointment, take prescribed medications consistently, and return to the ER immediately if any symptoms come back. The window after a TIA is both the period of highest danger and the period of greatest opportunity to prevent something far worse.