Not all strokes present with obvious symptoms. Silent strokes can occur without warning, but they still have an impact on the brain. Learn about their hidden causes and signs.
Strokes are often associated with sudden, obvious symptoms, such as a sudden drooping of the face to one side, slurred speech, or sudden weakness on one side of the body. However, some types of strokes can occur without any obvious symptoms and can even occur without the sufferer even realizing it. This condition is known as a silent stroke , or a stroke that occurs "silently."
How Can a Stroke Happen Without Symptoms?
A silent stroke occurs when blood flow to a part of the brain is disrupted, just like a typical stroke. However, the affected area doesn't cause typical symptoms like slurred speech or weakness on one side of the body. Therefore, even though brain tissue damage still occurs, the symptoms can be very mild, vague, or even completely unnoticeable to the sufferer.
Many cases of silent stroke are discovered accidentally, for example when someone undergoes a brain imaging test, especially a brain MRI, for another medical purpose, and a small area of damage or scarring is found on the brain indicating a previous disruption in blood flow.
Why "Asymptomatic" Doesn't Mean No Impact?
Although silent strokes don't cause obvious symptoms in the short term, they still leave permanent damage to the affected brain tissue. This makes them a cause for concern, as repeated silent strokes can lead to increasingly extensive brain damage.
Some of the long-term impacts associated with repeated silent strokes include:
- Gradual decline in cognitive function, such as memory loss or difficulty concentrating
- Changes in mood or personality that appear gradually
- Mild disturbances in balance or coordination of movement, which are sometimes considered part of normal aging
- Increased risk of having a major stroke later in life, because silent strokes signal an underlying problem with the brain's blood vessels
Minor Signs? Subtleties That Are Often Missed
Although called " silent " or without clear symptoms, the following changes sometimes appear and need to be paid attention to, especially if they occur repeatedly or get worse:
- Occasionally feel a little unsteady or unbalanced for no apparent reason
- Some difficulty remembering things that have happened recently
- Small changes in thinking or decision-making abilities
- Unusual mood changes, such as becoming more irritable
- A brief episode of confusion or difficulty finding the right word, which quickly passes.
Because the symptoms are mild and often attributed to fatigue or aging, many people do not realize that they may be related to an underlying cerebrovascular disorder.
Who is at Higher Risk?
The risk factors for silent stroke are basically the same as the risk factors for stroke in general, including:
- Uncontrolled high blood pressure
- Diabetes
- High cholesterol levels
- Smoking habit
- Increasing age
- History of heart rhythm disturbances, such as atrial fibrillation
- Family history of stroke or cardiovascular disease
Why Is Early Detection Still Important?
Even if a silent stroke has already occurred and the damage is irreversible, early detection still offers significant benefits. By recognizing the presence of a silent stroke , doctors can evaluate underlying risk factors and provide basic treatment to prevent further symptoms, including the potential for a stroke that can lead to more severe disabilities.
Don't Wait Until Major Symptoms Appear
Silent stroke reminds us that brain blood vessel health cannot always be assessed solely by the presence or absence of visible symptoms. The team of neurology specialists at EMC Grha Kedoya Hospital is ready to assist you in conducting a comprehensive evaluation of stroke risk factors, including the necessary tests to detect early signs of brain blood vessel disorders.
Don't wait for major symptoms to appear to start caring about your brain health. Discuss your risk factors and condition with a neurosurgeon at EMC Grha Kedoya Hospital before a silent stroke develops into a more serious threat.
The article was written by Dr. Sigit Dewanto, Sp.N, FINS, FINA and Dr. Priscilla R. Andradi, Sp.N (Neurology Specialist Doctor at EMC Grha Kedoya Hospital).