Navigation Links
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 in the brain and greater levels of dementia.

The MRI results showed that in all patient groups blood flow in the brain was substantially decreased in patients with hypertension compared to those without. Cerebral blood flow was lowest among the Alzheimer's patients with hypertension, but the normal group with hypertension showed significantly lower cerebral blood flow than the normal group without hypertension.

"These results suggest that by changing blood flow to the brain, hypertension -- treated or untreated -- may contribute to the pathology of Alzheimer's," Raji said.

Co-authors are C. Lee, M.D., W. Dai, Ph.D., J.Becker, Ph.D., L. Kuller, M.D., H. Gach, Ph.D., et al.

AT A GLANCE

-- Hypertension reduces cerebral blood flow in people with Alzheimer's

disease.

-- Arterial spin-labeled MRI is a novel, noninvasive imaging technique

that can measure cerebral blood flow.

-- Approximately 50 million Americans have hypertension.

Note: Copies of RSNA 2007 news releases and electronic images will be available online at RSNA.org/press07 beginning Monday, Nov. 26.

RSNA is an association of more than 41,000 radiologists, radiation oncologists, medical physicists and related scientists committed to excellence in patient care through education and research. The Society is based in Oak Brook, Ill. (RSNA.org)

Editor's note: The data in these releases may differ from those in the printed abstract and those actually presented at the meeting, as researchers continue to update their data right up until the meeting. To ensure you are using the most up-to-date information, please call the RSNA Newsroom at 1-312-949-3233.


'/>"/>
SOURCE Radiological Society of North America
Copyright©2007 PR Newswire.
All rights reserved

Related medicine technology :

1. PNH Patients Treated with Soliris(TM) Experienced Dramatic Reduction in Blood Clots During Clinical Trials
2. ImmuneRegen BioSciences, Inc. Demonstrates Radilex(TM) Increases Disease-Fighting White Blood Cells
3. Cleveland Clinic Researchers Identify Mechanism Behind Platelet Function and Potentially Fatal Blood Clot Formation
4. Largest Study to Date Shows Significant Reductions in Risks of Blood Clots and Reintervention With CYPHER(R) Sirolimus-eluting Coronary Stent Compared to Taxus Stent
5. Nebivolol Lowers Blood Pressure in Mild-to-Moderate Hypertensive Patients as Demonstrated in a Study Published in the Journal of Clinical Hypertension
6. American Heart Association Comment Saving Lives in Type 2 Diabetics: Could It Be as Easy as Lowering Blood Pressure?
7. BioMosaics Glypican-3 Blood & Tissue Tests Receive CE Marking in Europe
8. Uncontrolled Blood Pressure Highest Among Hispanics, Prompting New Hypertension Project in Miami
9. AspenBio Pharma Reports Strong Results with Appendicitis Triage Blood Test from Large Multiple Hospital Study
10. Microlifes Home Blood Pressure Monitors Proven Accurate Even for Critical Patients
11. WaveSense Blood Glucose Meter One of Few Brands to Pass Rigorous TNO Tests
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/2/2017)... , Oct. 2, 2017  AllianceRx Walgreens Prime, the ... by Walgreens and pharmacy benefit manager Prime Therapeutics LLC ... brand, which included the unveiling of new signage at ... as well as at a few other company-owned facilities ... brand to patients, some of whom will begin to ...
(Date:10/2/2017)... 2017 The Rebound mobile app is poised to ... the tide of prescription drug addiction. The app empowers users ... and stepping down their dosage in a safe, controlled manner ... 2017; the first 100,000 people to sign up will enjoy ... ...
(Date:9/28/2017)... 2017 Cohen Veterans Bioscience and Early Signal ... wearable and home sensors for real-time monitoring of patients ... a nonprofit organization focused on disruptive health solutions for ... analytical system to record and integrate behavioral, cognitive, physiological ... ...
Breaking Medicine Technology:
(Date:10/13/2017)... ... October 13, 2017 , ... PurhealthRX , a leading ... Purzorb™ technology. Applying the Purzorb™process to full spectrum CBD oil will revolutionize the rapidly ... CBD form that can be easily incorporated into liquid products, while reducing costs to ...
(Date:10/13/2017)... CT (PRWEB) , ... October 13, 2017 , ... ... long-term care services, staged a mock evacuation of the facility as part of a ... Shelton Fire Department, Echo Hose EMS and Shelton City Emergency Manager, as well as ...
(Date:10/13/2017)... ... 2017 , ... Ellevate Network, the leading network for professional women, brought together ... equality at their inaugural Summit in New York City in June. The event was ... of over 3 million. To watch the Mobilize Women video, click here . ...
(Date:10/13/2017)... ... October 13, 2017 , ... Talented host, ... lowdown on sciatica in a new episode of "Success Files," which is an ... and innovation and investigates each subject in-depth with passion and integrity. , Sciatica ...
(Date:10/13/2017)... ... ... “America On The Brink”: the Christian history of the United States and ... of published author, William Nowers. Captain Nowers and his wife, Millie, have six ... years in the Navy. Following his career as a naval aviator and carrier ...
Breaking Medicine News(10 mins):