I recently saw a patient who had just visited the emergency room, worried he might be having a stroke. He had experienced numbness on one side of his face, but fortunately, his symptoms resolved within a few hours. He was diagnosed with a transient ischemic attack and was sent home in stable condition a few days later.

I then had another patient who had suffered two strokes in the past year. Sadly, he is now bedridden and unable to speak. The contrast between these two patients was a stark reminder of how devastating strokes can be and the importance of early intervention.

Imagine your brain as the control center of your body. It needs a steady supply of oxygen and nutrients, delivered by your blood vessels, to function properly. If something interrupts this flow, even briefly, the consequences can be serious. This is the story of TIAs and strokes, two conditions that can affect the brain in dramatic ways. Let’s break them down.

What Are Transient Ischemic Attacks?

A TIA, often called a “mini-stroke,” is a temporary interruption of blood flow to the brain. The word “transient” means short-lived, and unlike a stroke, TIAs do not cause permanent brain damage. However, they should never be ignored.

During a TIA, blood flow is blocked for a few minutes, often because of a blood clot. This brief interruption can cause symptoms similar to a stroke, such as:

•Sudden weakness or numbness in the face, arm, or leg, often on one side of the body

•Trouble speaking or understanding speech

•Blurred or double vision

•Dizziness; loss of balance or coordination

The symptoms usually last less than 24 hours and often resolve within minutes. But don’t be fooled by their temporary nature — TIAs are a serious warning sign. About one in three people who experience a TIA will go on to have a stroke, sometimes within days or weeks.

What Is a Stroke?

A stroke occurs when blood flow to a part of the brain is blocked or when a blood vessel in the brain bursts, causing brain cells to die. Unlike a TIA, the damage from a stroke can be permanent, leading to disability or even death.

There are two main types of strokes:

1. Ischemic Stroke — This is the most common, making up about 87 percent of all strokes. It happens when a blood clot or fatty deposit blocks blood flow to the brain. Think of it as a traffic jam in your brain’s blood vessels, preventing oxygen from reaching certain areas.

2. Hemorrhagic Stroke — This occurs when a blood vessel in the brain bursts, causing bleeding. High blood pressure and aneurysms (weakened blood vessel walls) are common culprits.

Picture a pipe bursting and flooding your brain with blood, damaging the tissues around it.

Recognizing the Warning Signs

When it comes to strokes and TIAs, time is crucial. The faster you seek help, the better your chances of recovery. Use the acronym F.A.S.T. to remember the warning signs:

Face: Is one side of the face drooping or numb? Ask the person to smile.

Arms: Is one arm weak or numb? Ask them to raise both arms.

Speech: Is their speech slurred or strange? Ask them to repeat a simple sentence

Time: If you notice any of these signs, call emergency services immediately.

Even if the symptoms go away, as with a TIA, it’s important to seek medical attention. Time is brain, and TIAs and strokes are medical emergencies. Go to the emergency room immediately.

What Causes TIAs and Strokes?

Both conditions share many risk factors, including: high blood pressure, obesity and a sedentary lifestyle, diabetes, high cholesterol, heart disease, and smoking.