In hospital, doctors will carry out tests to check whether you have had a stroke, or have another condition. If it's a stroke, they will work out what kind of stroke it is, find out which part of your brain is affected and decide how to treat it. You might need different tests.
Strokes are usually diagnosed by doing physical tests and studying images of the brain produced during a scan. When you first arrive at hospital with a suspected stroke, the doctor will want to find out as much as they can about your symptoms.
You should have a brain scan soon after symptoms start, within an hour of arriving at hospital if possible. The scan can show whether the stroke is due to a clot or a bleed. There are two main types of scan used: A computed tomography or CT scan.
Usually, a silent stroke is discovered unexpectedly on a brain CT or brain MRI. These imaging tests can easily distinguish past strokes from recent strokes.
Most stroke patients are unaware of the warning signs of stroke and present late because they misjudge the seriousness of their symptoms. Even when patients know that they are having a stroke, most do not seek immediate medical attention.
Any irregularities or causes for concern show up in a CT scan approximately six to eight hours after the onset of the first signs of a stroke. During a CT scan, the patient may be intravenously injected with dyes, which will highlight any abnormal areas in the scan, giving doctors a clearer view of the head.
In the early stages of a TIA, it's not possible to tell whether you're having a TIA or a full stroke. It's important to call 999 immediately and ask for an ambulance if you or someone else has symptoms of a TIA or stroke. If a TIA is suspected, you should be offered aspirin to take straight away.
Unfortunately, most people don't actually find out they've suffered from a silent stroke until they see a doctor for another condition and are ordered to have an MRI or a CT scan. At that point, their doctor may notice small areas of damage in the brain indicating a silent stroke.
When the clot moves away, the stroke symptoms stop. You might feel like you're fine afterwards, but it's vital to get medical help right away.
In fact, ischemic strokes unfold over a period of 10 hours. That means that with every second you wait for treatment, the brain damage gets worse. If a stroke is untreated for the full 10 hours, the brain ages up to 36 years! With every minute you wait, the brain loses two million brain cells.
MRI uses magnetic fields to detect subtle changes in the content of brain tissue. One effect of stroke is the slowing of water movement, called diffusion, through the damaged brain tissue, and MRI can show this type of damage within the first hour after the stroke symptoms start.
Priority stroke care in the emergency room
Once the patient arrives in the emergency room, we perform a computed tomography (CT) scan to diagnose the type of stroke the patient is having. Our patients who have had a stroke are given priority access to get a CT scan as soon as they arrive.
What Happens if a Mini Stroke Goes Untreated? A mini stroke may resolve on its own, but it's difficult to know just how serious the circumstances are without a thorough medical workup. Familiarizing yourself with these symptoms will allow you to act quickly, which is crucial for avoiding permanent brain damage.
How Does a Stroke Impact Life Expectancy? Despite the likelihood of making a full recovery, life expectancy after stroke incidents can decrease. Unfortunately, researchers have observed a wide range of life expectancy changes in stroke patients, but the average reduction in lifespan is nine and a half years.
Detecting a Silent Stroke
If you have a silent stroke, you probably won't know it unless you happen to have a brain scan and the damage shows up. You may have slight memory problems or a little difficulty getting around. A doctor may be able to see signs of silent strokes without testing.
Whenever a stroke occurs, the brain sustains some damage, even during a mild stroke. You may not be in the clear even if physical symptoms disappear.
One of the most common stroke mimics is a seizure, which researchers believe account for as many as 20% of all stroke mimics. Other common stroke mimics include migraines, syncope, sepsis, brain tumor and metabolic derangement (low sodium or low blood sugar).
Tests will be done to rule out a stroke or other disorders that may cause the symptoms: You will likely have a head CT scan or brain MRI. A stroke may show changes on these tests, but TIAs will not. You may have an angiogram, CT angiogram, or MR angiogram to see which blood vessel is blocked or bleeding.
Blood tests for stroke. There is no blood test that can diagnose a stroke. However, in the hospital, your doctor or nurse may do a series of blood tests to learn the cause of your stroke symptoms: Complete blood count (CBC).
Introduction. Brain magnetic resonance imaging (MRI) is the preferred and most sensitive modality after transient ischemic attack (TIA) or minor stroke. It should include diffusion-weighted imaging (DWI) and should be completed within 24 hours of symptom onset1,2; its use is 3-fold.
During a silent stroke, the interruption in blood flow occurs in part of the brain that doesn't control any vital functions. Although it doesn't cause any obvious symptoms—most people who've had a silent stroke have no idea it occurred—the damage does show up on an MRI or CT scan.