Featured Research

from universities, journals, and other organizations

Mexican-Americans with heart rhythm disorder have increased risk for second stroke

Date:
September 12, 2010
Source:
American Heart Association
Summary:
Mexican-American stroke survivors with atrial fibrillation had more than double the risk for a second stroke compared to non-Hispanic white survivors with the disorder, according to a new study. Strokes were more severe among these Mexican-Americans than among non-Hispanic whites; however, researchers found no major differences in death rates between the two groups. Researchers said the findings could help physicians develop strategies to prevent recurrent stroke in Mexican-Americans.

Mexican-American stroke survivors with a heart rhythm disorder have more than twice the risk for another stroke compared to non-Hispanic whites, according to a study published in Stroke: Journal of the American Heart Association.

Related Articles


Mexican-Americans' recurrent strokes are also more likely to be severe, though they don't have a greater risk of death after stroke, researchers said.

Researchers compared 88 Mexican-American and 148 non-Hispanic white stroke survivors who had atrial fibrillation, a disorder in which the heart's upper chambers (called the atria) beat irregularly and don't pump blood effectively, possibly causing blood to pool within the atria and blood clot formation in the heart.

They found that the likelihood of suffering another stroke during the study follow-up period was more than double for Mexican-Americans than for non-Hispanic whites. Although stroke recurrence was higher and strokes were more severe among Mexican-Americans, death rates didn't differ between the two groups.

"Based on some of our prior research, we were not necessarily surprised by the higher recurrence risk in Mexican-Americans with atrial fibrillation, but the greater severity of recurrent strokes in Mexican-Americans was surprising," said Darin B. Zahuranec, M.D., study co-author and an assistant professor of neurology at the University of Michigan Cardiovascular Center in Ann Arbor.

Results are based on cases of ischemic stroke and transient ischemic attack from the Brain Attack Surveillance in Corpus Christi Project, a population-based stroke surveillance study. The data were collected between January 2000 and June 2008. Corpus Christi has a large Mexican-American population and is located along the Gulf coast of Texas.

The study also showed that Mexican-American patients were younger, less likely to have completed 12 years of education, more likely to have diabetes, and less likely to have a primary care physician. Researchers found no ethnic differences between the two groups in the severity of the first stroke.

Nineteen Mexican-Americans and 14 non-Hispanic whites had at least one recurrent stroke over a median follow-up of 427.5 days; all but one event was an ischemic stroke (one Mexican-American patient experienced intracerebral hemorrhage).

One reason for the difference could be that the management of warfarin -- a blood thinning drug -- among Mexican-Americans may not be optimal, Zahuranec said. However, the study found no ethnic difference in the proportion of patients who were prescribed warfarin at hospital discharge. They did not evaluate data looking at outpatient use of warfarin after hospital discharge which might have contributed to the increased risk of stroke in Mexican-Americans.

Atrial fibrillation affects approximately 2.2 million Americans; about 15 percent of strokes occur among individuals with atrial fibrillation.

Co-authors areJ.R. Simpson, M.D.; L.D Lisabeth, Ph.D.; B.N. Sαnchez, Ph.D.; L.E. Skolarus M.D.; J.E. Mendizabal, M.D.; M.A. Smith, DrPH; N.M. Garcia, B.S.; and L.B. Morgenstern, M.D. Author disclosures are on the manuscript.

The study was funded by the National Institutes of Health.


Story Source:

The above story is based on materials provided by American Heart Association. Note: Materials may be edited for content and length.


Journal Reference:

  1. Jennifer R. Simpson, Darin B. Zahuranec, Lynda D. Lisabeth, Brisa N. Sαnchez, Lesli E. Skolarus, Jorge E. Mendizabal, Melinda A. Smith, Nelda M. Garcia, and Lewis B. Morgenstern. Mexican Americans With Atrial Fibrillation Have More Recurrent Strokes Than Do Non-Hispanic Whites. Stroke, 2010; DOI: 10.1161/STROKEAHA.110.589127

Cite This Page:

American Heart Association. "Mexican-Americans with heart rhythm disorder have increased risk for second stroke." ScienceDaily. ScienceDaily, 12 September 2010. <www.sciencedaily.com/releases/2010/09/100909164433.htm>.
American Heart Association. (2010, September 12). Mexican-Americans with heart rhythm disorder have increased risk for second stroke. ScienceDaily. Retrieved March 6, 2015 from www.sciencedaily.com/releases/2010/09/100909164433.htm
American Heart Association. "Mexican-Americans with heart rhythm disorder have increased risk for second stroke." ScienceDaily. www.sciencedaily.com/releases/2010/09/100909164433.htm (accessed March 6, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Friday, March 6, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Just A Half-Hour Of Lost Sleep Could Lead To Weight Gain

Just A Half-Hour Of Lost Sleep Could Lead To Weight Gain

Newsy (Mar. 6, 2015) — A new study found losing just half an hour of sleep could make you gain weight. Video provided by Newsy
Powered by NewsLook.com
Suicide Rates Up For Young Women In U.S.

Suicide Rates Up For Young Women In U.S.

Newsy (Mar. 6, 2015) — According to a report from the CDC, suicide rates among young women increased from 1994 to 2012 while rates among young men have decreased. Video provided by Newsy
Powered by NewsLook.com
Bupa Eyes India Healthcare Opportunities

Bupa Eyes India Healthcare Opportunities

Reuters - Business Video Online (Mar. 5, 2015) — Bupa is hoping to expand in India&apos;s fast-growing health insurance market, once a rule change on foreign investment is implemented. The British private healthcare group&apos;s CEO tells Grace Pascoe why it&apos;s so keen on the new opportunity. Video provided by Reuters
Powered by NewsLook.com
Liberia Releases Last Ebola Patient, But Threat Remains

Liberia Releases Last Ebola Patient, But Threat Remains

Newsy (Mar. 5, 2015) — Liberia&apos;s last Ebola patient has been released, and the country hasn&apos;t recorded a new case in a week. However, fears of another outbreak still exist. 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