Featured Research

from universities, journals, and other organizations

Some Types Of Temporary Neurological Problems Associated With Increased Risk For Stroke, Dementia

Date:
December 28, 2007
Source:
JAMA and Archives Journals
Summary:
Patients who experience symptoms described as transient neurological attacks, such as temporary amnesia or confusion, may have a higher risk for stroke and dementia, according to a study in the Dec. 26 issue of JAMA.

Patients who experience symptoms described as transient neurological attacks, such as temporary amnesia or confusion, may have a higher risk for stroke and dementia, according to a study in the December 26 issue of JAMA.

Related Articles


Transient neurological attacks (TNAs) are episodes involving temporary (less than 24 hours) neurological symptoms. These symptoms can be nonfocal (that can include nonlocalizing cerebral symptoms), focal (known as transient ischemic attacks [TIAs], similar to ischemic stroke, except for duration [commonly 2-15 minutes, maximum 24 hours]), or a mixture of both focal and nonfocal. Although it has been well-documented that patients with TIA are at high risk of major vascular disease, few studies have examined whether nonfocal TNAs are a serious health threat, according to background information in the article.

Michiel J. Bos, M.D., M.Sc., of Erasmus Medical Center, Rotterdam, the Netherlands, and colleagues studied the incidence and prognosis of focal, nonfocal and mixed TNAs. The study included 6,062 participants who were age 55 years or older and free from stroke, heart attack, and dementia when they entered the study (1990-1993), and were followed-up until January 2005.

During the study a TNA occurred in 548 participants; 282 of these were classified as focal, 228 as nonfocal, and 38 as mixed. In both men and women, the incidence rates for nonfocal TNAs were almost as frequent as focal TNAs, and for both types of events the incidence rates strongly increased with increasing age. Mixed TNAs were less frequent.

During follow-up, there were 619 cases of stroke, 848 cases of ischemic heart disease, 662 vascular deaths (also classified as having stroke [192] or ischemic heart disease [430]) and 609 cases of dementia. Compared with participants without TNA, participants with focal TNA had more than twice the risk of stroke and 2.6 times the risk of ischemic stroke; the risk of stroke within 90 days after focal TNA (TIA) was 3.5 percent. Patients with nonfocal TNA had a 56 percent higher risk of stroke and 59 percent higher risk of dementia, than participants without TNA.

Patients with mixed TNA were at increased risk of stroke, especially ischemic stroke; ischemic heart disease, especially heart attack; and vascular death and dementia, compared with participants without TNA.

"Our findings challenge the strong but unfounded conviction that nonfocal TNAs are harmless. On the contrary, our findings suggest that nonfocal TNAs are not only a risk factor for stroke, but also for dementia," the authors write.


Story Source:

The above story is based on materials provided by JAMA and Archives Journals. Note: Materials may be edited for content and length.


Cite This Page:

JAMA and Archives Journals. "Some Types Of Temporary Neurological Problems Associated With Increased Risk For Stroke, Dementia." ScienceDaily. ScienceDaily, 28 December 2007. <www.sciencedaily.com/releases/2007/12/071226003805.htm>.
JAMA and Archives Journals. (2007, December 28). Some Types Of Temporary Neurological Problems Associated With Increased Risk For Stroke, Dementia. ScienceDaily. Retrieved November 28, 2014 from www.sciencedaily.com/releases/2007/12/071226003805.htm
JAMA and Archives Journals. "Some Types Of Temporary Neurological Problems Associated With Increased Risk For Stroke, Dementia." ScienceDaily. www.sciencedaily.com/releases/2007/12/071226003805.htm (accessed November 28, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Friday, November 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola Leaves Orphans Alone in Sierra Leone

Ebola Leaves Orphans Alone in Sierra Leone

AFP (Nov. 27, 2014) — The Ebola epidemic sweeping Sierra Leone is having a profound effect on the country's children, many of whom have been left without any family members to support them. Duration: 01:02 Video provided by AFP
Powered by NewsLook.com
Experimental Ebola Vaccine Shows Promise In Human Trial

Experimental Ebola Vaccine Shows Promise In Human Trial

Newsy (Nov. 27, 2014) — A recent test of a prototype Ebola vaccine generated an immune response to the disease in subjects. Video provided by Newsy
Powered by NewsLook.com
Pet Dogs to Be Used in Anti-Ageing Trial

Pet Dogs to Be Used in Anti-Ageing Trial

Reuters - Innovations Video Online (Nov. 26, 2014) — Researchers in the United States are preparing to discover whether a drug commonly used in human organ transplants can extend the lifespan and health quality of pet dogs. Video provided by Reuters
Powered by NewsLook.com
Today's Prostheses Are More Capable Than Ever

Today's Prostheses Are More Capable Than Ever

Newsy (Nov. 26, 2014) — Advances in prosthetics are making replacement body parts stronger and more lifelike than they’ve ever been. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins