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High blood pressure may lead to brain injury and to premature brain aging, even among people with only slightly elevated readings.
Brain scientists from the Alzheimers Disease Center at the University of California, Davis, are studying the links between systolic blood pressure (thats the first number in a reading, and measures the pressure of the blood on the vessels as the heart beats) and various indicators of brain injury among middle-aged adults. In their latest work, published in Lancet Neurology, the scientists report a subtle, negative effect of high systolic blood pressure on the structural integrity of the brains white matter, and a similar negative effect of elevated blood pressure on the volume of grey matter in the brain.
(MORE: A Salty Diet is a Recipe for High Blood Pressure in Kids Too)
That means that by age 40, the brain of a person with hypertension or clinically high blood pressure of 140/90 mm Hg, looks 7.2 years older than the brain of a person with normal blood pressure, according to indicators of brain function and anatomy that the researchers measured. And its not just those with clinical hypertension who have to worry; the team saw changes in brain structure among people with normal blood-pressure readings or with systolic readings just slightly higher than normal. The higher the systolic blood pressure, it seems, the greater the signs of brain damage.
These findings are consistent with previous research that links hypertension to brain damage. But this is the first study to show an association beginning so early in life. This study finds the same kind of structural injuries that have been linked to cognitive decline and increased risk of dementia among elderly people, but instead among those in just their 30s and 40s.
(MORE: Blood Pressure Only Slightly High? You May Still Be at Risk of Stroke)
The message here is really clear: People can influence their late-life brain health by knowing and treating their blood pressure at a young age, when you wouldnt necessarily be thinking about it, said Dr. Charles DeCarli, senior author on the study and the director of the UC Davis Alzheimers Disease Center. The people in our study were cognitively normal, so a lack of [cognitive-decline] symptoms doesnt mean anything.
To conduct their study, DeCarli and colleagues looked at blood-pressure readings and brain scans from 579 people, aged 19 to 63, participating in the Framingham Heart Study. Running since 1948, Framingham is probably the single most important study ever conducted on heart disease risk factors. Over the years, it has revealed the role of obesity, high blood pressure, and high cholesterol in determining heart-disease risk all things that, today, we take for granted as common knowledge. Framingham is now helping to reveal the role that heart health plays in cognitive performance as well.
DeCarlis research shows that measurable brain injury can occur decades before clinical signs of dementia appear. And, with ever-stronger evidence for a link between heart health and brain health, the new findings suggest that all adults, not just the elderly, should be vigilant about managing their blood pressure.
More here:
High Blood Pressure A Danger for People As Young As 40
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