People over 60, especially those with high blood pressure are at an increased risk to suffer from "Silent" strokes which don't result in any noticeable symptoms but cause brain damage. Photo Credit: AFPJuly 27, 2009, (Sawf News) - People over 60, especially those with high blood pressure are at an increased risk to suffer from "Silent" strokes which don't result in any noticeable symptoms but cause brain damage.
"These strokes are not truly silent, because they have been linked to memory and thinking problems and are a possible cause of a type of dementia," said study author Perminder Sachdev, MD, PhD, of the University of New South Wales in Sydney, Australia. "High blood pressure is very treatable, so this may be a strong target for preventing vascular disease."
The study involved 477 people age 60 to 64 who were followed for four years. At the beginning of the study 7.8 percent of the participants had the silent lacunar infarctions, small areas of damage to the brain seen on MRI that never caused obvious symptoms. They occur when blood flow is blocked in one of the arteries leading to areas deep within the brain, such as the putamen or the thalamus. By the end of the study, an additional 1.6 percent of the participants had developed "silent" strokes.
People with high blood pressure were 60 percent more likely to have silent strokes than those with normal blood pressure.
Also, people with another type of small brain damage called white matter hyperintensities were nearly five times as likely to have silent strokes as those without the condition.
People who suffer from silent strokes double their chances of getting subsequent major stroke and dementia.
Signs of a potential stroke include:
- Sudden numbness or weakness of the face, arms, or legs, especially on one side of the body.
- Sudden confusion, trouble speaking, or trouble understanding.
- Sudden trouble seeing in one or both eyes.
- Sudden trouble walking, dizziness, and loss of balance or coordination.
- Sudden, severe headache with no known cause.
The study is published in the July 28, 2009, print issue of Neurology®, the medical journal of the American Academy of Neurology.
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