Irregular Heartbeat Leads to Mental Decline: Study

Wednesday, 05 Jun 2013 05:24 PM

 

Share:
  Comment  |
   Contact Us  |
  Print  
|  A   A  
  Copy Shortlink
Older people who suffer from a type of irregular heartbeat called atrial fibrillation may also be more likely to experience mental declines sooner, a new study suggests.
"Problems with memory and thinking are common for people as they get older," said lead researcher Evan Thacker, a statistician in the department of epidemiology at the University of Alabama at Birmingham. "Our study shows that, on average, these problems may start earlier or get worse more quickly in people who have atrial fibrillation. This means that heart health is an important factor related to brain health."

ALERT: These 7 Things Activate Alzheimer’s In Your Brain

As with other such studies, this one established only an association between atrial fibrillation and mental decline, not a direct cause-and-effect relationship.

That's why the next step is to find out why people with atrial fibrillation start to struggle with memory and thinking sooner, Thacker said.

There are at least two possibilities, he said. First, people with atrial fibrillation may have small blood clots form in the heart that then become lodged in the brain.

"These may be too small to cause noticeable strokes, but may over time cause small damage to the brain that would eventually lead to mental decline," Thacker said.
Second, people with atrial fibrillation may simply have less blood flowing to the brain, he said.

"This could result in the brain not getting as much oxygen and nourishment as it needs, which could lead to damage over time that would result in mental problems," Thacker said.

"Currently, we do not know whether either of these two possibilities actually occurs," he said. "We would like to study it using brain imaging technology to learn more about what is happening in the brains of people with atrial fibrillation."

Eventually, if doctors and researchers can discover why people with atrial fibrillation show accelerated mental decline, they might be able to learn how to prevent the problem, Thacker said.

The report was published online June 5 in the journal Neurology.

Dr. Gregg Fonarow, a professor of cardiology at the University of California, Los Angeles, said, "Atrial fibrillation is present in close to 3 million men and women in the United States and increases the risk of stroke fivefold compared to the general population."

In addition to the marked increase in the risk of stroke, more recent research suggests that atrial fibrillation is associated with an increased risk of mental decline and dementia, he said.

"Repetitive, small subclinical strokes in patients with atrial fibrillation may account for these findings," Fonarow said.

He said giving blood thinners to patients with atrial fibrillation is standard care to prevent clots in the heart from migrating to the brain.

Putting these patients on anticoagulants, such as warfarin or one of the newer therapies, will "likely be effective in not only reducing the risk of stroke, but also reducing the significant risk of mental decline and dementia," he said.

To see the effect atrial fibrillation had on memory and thinking, Thacker's team collected data on more than 5,000 people aged 65 and older who took part in the Cardiovascular Health Study.

SPECIAL: These 4 Things Happen Right Before a Heart Attack — Read More.

At the start of the study, none of the participants had atrial fibrillation. Over an average of seven years of follow-up, more than 550 people developed the condition, the researchers noted.

Each year during the study, all the participants were given a 100-point memory and thinking test.

The researchers found that people with atrial fibrillation were more likely to have lower scores on the test at an earlier age, compared with those who didn't develop atrial fibrillation.

For example, the average score on the test decreased by about six points for people without atrial fibrillation between ages 80 and 85, compared to about 10 points for those with atrial fibrillation.

For those aged 75 and older with atrial fibrillation, the average decline was about three to four points faster every five years, compared to people without atrial fibrillation.

Scores below 78 points are associated with dementia, Thacker said.

The researchers predicted that on average, those without atrial fibrillation would score below 78 when they were 87, while people with atrial fibrillation would score below 78 when they were 85.

© HealthDay

Share:
  Comment  |
   Contact Us  |
  Print  
  Copy Shortlink
Around the Web
Join the Newsmax Community
Please review Community Guidelines before posting a comment.
>> Register to share your comments with the community.
>> Login if you are already a member.
blog comments powered by Disqus
 
Email:
Country
Zip Code:
Privacy: We never share your email.
 
Hot Topics
Follow Newsmax
Like us
on Facebook
Follow us
on Twitter
Add us
on Google Plus
Around the Web
Top Stories
You May Also Like

Daily Aspirin Cuts Prostate Cancer Risk: Study

Tuesday, 30 Sep 2014 12:06 PM

Men who take a daily dose of aspirin or similar anti-inflammatory medicine may also reduce their risk of developing pros . . .

Did A-Bomb Test Give New Mexico Residents Cancer?

Tuesday, 30 Sep 2014 12:02 PM

Researchers from the National Cancer Institute want to know how many past and present cancer cases in New Mexico may be  . . .

Granny Smith Apples Keep You Slim: Study

Tuesday, 30 Sep 2014 11:58 AM

Non-digestible compounds found in apples promote the growth of friendly gut bacteria, which stabilizes the metabolism an . . .

Most Commented

Newsmax, Moneynews, and Independent. American. are registered trademarks of Newsmax Media, Inc. Newsmax TV, NewsmaxWorld, NewsmaxHealth, are trademarks of Newsmax Media, Inc.

 
NEWSMAX.COM
America's News Page
©  Newsmax Media, Inc.
All Rights Reserved