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.
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.
The longer a stroke goes untreated, the more damage can be done — possibly permanently — to the brain. “If you suspect you or someone you're with is having a stroke, don't hesitate to call 911,” Dr. Humbert says. “It could save a life.”
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).
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.
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.
Stroke symptoms that go away on their own are still a medical emergency. Get to a hospital as fast as you can. Every stroke is a medical emergency because it means that blood flow to part of the brain has been interrupted.
Stroke symptoms can develop slowly over hours or days. If you have a ministroke, also known as transient ischemic attack (TIA), symptoms are temporary and usually improve within hours. In this case, you may blame sudden symptoms on stress, a migraine, or nerve problems.
The first three days are of utmost importance for the recovery and survival rate of the stroke patient, since they can determine if the patient will have lifelong disabilities or leave the hospital and continue to be a productive part of the community.
In addition to the classic stroke symptoms associated with the FAST acronym, around 7-65% of people undergoing a stroke will experience some form of a headache. People describe a stroke-related headache as a very severe headache that comes on within seconds or minutes.
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.
During a silent stroke, an interruption in blood flow destroys areas of cells in a part of the brain that is "silent," meaning that it doesn't control any vital functions. Although the damage will show up on an MRI or CT scan, it's too small to produce any obvious symptoms.
Numbness or weakness in your face, arm, or leg, especially on one side. Confusion or trouble understanding other people. Difficulty speaking. Trouble seeing with one or both eyes.
When stroke occurs, the blood pressure (BP) often rises because of various factors, such as psychological stress, pain, elevated intracranial pressure, urinary retention, and hypoxemia.
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).
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.
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.
You do not need to be admitted to hospital because of a TIA, but this is often done because of the absence of an alternative. Many TIA clinics now offer a “one-stop” service for which the patient is assessed, investigated (or investigated before the appointment), and given results at the same session.
Magnetic resonance imaging (MRI).
An MRI can detect brain tissue damaged by an ischemic stroke and brain hemorrhages. Your doctor may inject a dye into a blood vessel to view the arteries and veins and highlight blood flow (magnetic resonance angiography or magnetic resonance venography).
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.
If you get to the hospital within 3 hours of the first symptoms of an ischemic stroke, you may get a type of medicine called a thrombolytic (a “clot-busting” drug) to break up blood clots. Tissue plasminogen activator (tPA) is a thrombolytic. tPA improves the chances of recovering from a stroke.