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.
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.
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.
You will likely have a head CT scan or brain MRI. A stroke may show changes on these tests, but TIAs will not.
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.
Sudden numbness or weakness in the face, arm, or leg, especially on one side of the body. Sudden confusion, trouble speaking, or difficulty understanding speech. Sudden trouble seeing in one or both eyes. Sudden trouble walking, dizziness, loss of balance, or lack of coordination.
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.
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.
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.
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.
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).
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.
The major risk factors for stroke include: High blood pressure. Diabetes. Heart and blood vessel diseases: Conditions that can cause blood clots or other blockages include coronary heart disease, atrial fibrillation, heart valve disease, and carotid artery disease.
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.
Time of Day
Both STEMI and stroke are most likely to occur in the early hours of the morning—specifically around 6:30am.
Signs of a mild stroke include:
Blurred vision. Difficulty speaking. Weakness or numbness on one side of the body.
A mild stroke is also known as a transient ischemic attack (TIA). A TIA is when blood flow to a part of the brain, spinal cord, or retina briefly stops. This can cause momentary stroke-like symptoms but doesn't harm brain cells or cause permanent disability.
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.
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.