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High Blood Pressure May Heighten Effects of Alzheimer's Disease
Date:11/28/2007

CHICAGO, Nov. 28 /PRNewswire/ -- Having hypertension, or high blood pressure, reduces blood flow in the brains of adults with Alzheimer's disease, according to a new study presented today at the annual meeting of the Radiological Society of North America (RSNA).

"While hypertension is not a cause of Alzheimer's disease, our study shows that it is another hit on the brain that increases its vulnerability to the effects of the disease," said study co-author Cyrus Raji, scientist and M.D. and Ph.D. candidate at the University of Pittsburgh where the study was conducted.

Hypertension is a condition in which the blood circulates through the arteries with too much force. According to the National Heart, Lung and Blood Institute, approximately 50 million Americans have hypertension. People with hypertension are at elevated risk for heart attack, stroke and aneurysm. Recently, there has been mounting evidence tying cardiovascular health to brain health.

"This study demonstrates that good vascular health is also good for the brain," said co-author Oscar Lopez, M.D., professor of neurology and psychiatry at the University of Pittsburgh. "Even in people with Alzheimer's disease, it is important to detect and aggressively treat hypertension and also to focus on disease prevention."

For the study, the researchers used arterial spin-labeled magnetic resonance imaging (MRI), which can measure blood flow in the brain, to image 68 older adults. Arterial spin-labeled MRI is a novel, noninvasive technique that requires no external contrast agent.

The patient group included 48 normal individuals, including 38 with hypertension and 10 without; 20 Alzheimer's patients, including 10 with hypertension and 10 without; and 20 adults with mild cognitive impairment, 10 with hypertension and 10 without. Mild cognitive impairment, which affects brain functions such as language, attention and reasoning, is a transition stage between normal aging deficits
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SOURCE Radiological Society of North America
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