A brain CT scan can show if there is bleeding in the brain or damage to the brain cells from a stroke. Magnetic resonance imaging (MRI) uses magnets and radio waves to create pictures of your brain. An MRI may be used instead of—or in addition to—a CT scan to diagnose a stroke.
Your doctor then will need to do blood tests and imaging tests to figure out which type of stroke you might have had. The most common kind is called ischemic stroke. Almost 90% of people who have a stroke have this, and it happens when a clot blocks blood flow.
Unlike a CT scan, which takes several hours to reveal any blockages of blood flow, an MRI can uncover any brain damage within an hour of the onset of the stroke symptoms. MRIs are also more accurate than CT scans since they are far more sensitive.
An MRI can sometimes show the site of the TIA, especially if it's done soon after it happens. But this is not the main way that a TIA is diagnosed.
Warning signs of an ischemic stroke may be evident as early as seven days before an attack and require urgent treatment to prevent serious damage to the brain, according to a study of stroke patients published in the March 8, 2005 issue of Neurology, the scientific journal of the American Academy of Neurology.
Can an ECG detect stroke? Yes. ECG can detect a heart problem that might lead to a stroke or even uncover a past problem such as a previous heart attack.
A CT scan of the head is usually one of the first tests used for a stroke. A CT scan can show bleeding in the brain or damage to brain cells. The CT scan also can find other problems that can cause stroke symptoms. Magnetic resonance imaging (MRI).
What is Pre-Stroke? Sometimes, there is a smaller, temporary clot that is quickly resolved, though the symptoms will be similar thanks to the effect such clots have on the brain. This is known as a Transient Ischemic Attack (TIA) or “Pre-Stroke,” and often points to a more life-threatening attack on its way.
Some of the most common stroke mimics are seizures, migraine, fainting, serious infections and functional neurological disorder (FND). Once the person is diagnosed, they can have treatment or support to manage their symptoms.
Sudden numbness or weakness in the face, arm, or leg — especially on one side of the body. Sudden confusion, trouble speaking, or understanding speech. Sudden problems seeing in one eye or both eyes. Sudden dizziness, loss of balance or coordination, or trouble walking.
Some people will experience symptoms such as headache, numbness or tingling several days before they have a serious stroke. One study found that 43% of stroke patients experienced mini-stroke symptoms up to a week before they had a major stroke.
A person experiencing a TIA might feel sudden weakness or numbness on one side of the body, have slurred speech, have trouble seeing or talking, and feel confused. The person may experience a combination of these symptoms at the same time. “The real takeaway?
Yes, you can have a stroke and not know it. A stroke's effects can be undetectable if the stroke is small or if the tissue damaged does not serve a critical function. Evidence of the stroke would show on a CT scan or an MRI of the brain, but it might not produce symptoms.
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).
If a stroke is suspected, a CT scan is usually able to show whether you have had an ischaemic stroke or a haemorrhagic stroke. It's generally quicker than an MRI scan and can mean you're able to receive appropriate treatment sooner.
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.
Strokes may not be seen on a CT scan for several reasons. It can sometimes take several hours for the brain to appear abnormal after the onset of stroke. The affected region may also be a part of the brain that CT scans do not image well, such as the cerebellum or the brainstem.
Undiagnosed stroke or misdiagnosed stroke means delayed treatment or no treatment at all. This allows brain cell death to continue, and can quickly escalate to preventable permanent brain injury or death.
The reason the first hour is golden is because stroke patients have a much greater chance of surviving and avoiding long-term brain damage if they arrive at the hospital and receive treatment with a clot-busting drug called TPA within that first hour.