Silent Stroke: What You Need to Know
Some people have strokes without realizing it. They’re called silent strokes, and they either have no easy-to-recognize symptoms, or you don’t remember them. But they do cause permanent damage in your brain.If you’ve had more than one silent stroke, you may have thinking and memory problems. They can also lead to more severe strokes.
Silent Strokes More Common Than You’d Expect
A study of middle-aged people with no apparent signs of stroke found that about 10% had brain damage from one.
The damage that happens is permanent, but therapy might help stimulate other parts of the brain so you regain abilities that may have weakened.
Simple Test For Stroke That Anyone Can Perform
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.
However, recently a team of stroke researchers has devised a one-minute test that can be used by ordinary people to diagnose stroke — and the test is so simple that even a child can use it. Such an easy, quick test could potentially save thousands of stroke sufferers from the disabling effects by allowing faster treatment.
“It is just three simple steps” says Jane Brice, MD, assistant professor of emergency medicine at the University of North Carolina-Chapel Hill School of Medicine. Brice tells WebMD that the test is based on a scale developed by researchers at the University of Cincinnati. The three-part test, called the Cincinnati Pre-Hospital Stroke Scale (CPSS), can be used to diagnose most strokes, says Brice.
Brice and her colleagues measured the accuracy of the test by first teaching it to 100 healthy bystanders. The bystanders then performed the test on stroke survivors. To diagnose a stroke, the bystanders performed the following three steps:
1. Bystander told the patients, “Show me your teeth.” The “smile test” is used to check for one-sided facial weakness — a classic sign of stroke.
2. Then the patients were told to close their eyes and raise their arms. Stroke patients usually cannot raise both arms to the same height, a sign of arm weakness.
3. Finally, the patients were asked to repeat a simple sentence to check for slurring of speech, which is another classic sign of stroke. “In Cincinnati, the researchers asked patients to say, ‘The sky is blue in Cincinnati,'” says Brice. But in the study, the researchers varied four simple phrases such as “Don’t cry over spilled milk.”
Overall, 97% of the bystanders were able to accurately follow the directions for giving the test, says Amy S. Hurwitz, a medical student at UNC who helped design the study.
The bystanders were 96% accurate at detecting speech problems and 97% accurate at spotting one-sided arm weakness. They were less accurate at detecting facial weakness — with only a 72% accuracy rate for this test. But Hurwitz says, “It is difficult to detect differences in the smile of a stranger. We are hoping that in most cases the ‘bystander’ will actually be someone who knows the patient and so an unusual smile will be apparent.”
“This is all about time,” says Edgar J. Kenton III, professor of clinical neurology at Thomas Jefferson University in Wynnewood, Pa. Kenton, who wasn’t involved in the study, says that clot-busting drugs used to treat most strokes can only be given within the first three hours after a stroke. Thus, he and other stroke specialists constantly seek ways to speed treatment.
“This is so simple that even a child could use it. Look at how many children have saved their parents by doing CPR, and this is so much simpler,” says Kenton. He says he thinks the test should be promoted for use by the general public.
Brice agrees with this assessment, saying that it could be like the Stop, Drop and Roll campaign to avoid burn injuries. “We call it: Talk, wave, smile.”
Cut Your Odds of a Stroke
Things you can do to reduce your chances of having one.