Featured Research

from universities, journals, and other organizations

Temporary Transient Heart Dysfunction Found In Some Long-distance Runners

Date:
May 19, 2009
Source:
American Thoracic Society
Summary:
A new study using advanced cardiac imaging technology indicates that cardiac abnormalities experienced by some marathon runners following competition are temporary, and do not result in damage to the heart muscle. The study marked the first use of cardiac magnetic resonance imaging, or CMR, in a post-marathon setting.

A new study using advanced cardiac imaging technology indicates that cardiac abnormalities experienced by some marathon runners following competition are temporary, and do not result in damage to the heart muscle. The study, conducted by researchers at the University of Manitoba, marked the first use of cardiac magnetic resonance imaging, or CMR, in a post-marathon setting.

Related Articles


The research will be presented on May 17, at the 105th International Conference of the American Thoracic Society in San Diego.

"Although previous studies of marathon runners have demonstrated biochemical evidence of cardiac injury and have correlated these findings with echocardiographic evidence of cardiac dysfunction, this was the first time CMR has been used to further evaluate and understand the effects of marathon running on the heart," said study investigator Davinder S. Jassal, M.D., assistant professor of cardiology, radiology and physiology at St. Boniface General Hospital Research Centre in Winnipeg.

The study examined the cardiac health of 14 runners who participated in the full 2008 Manitoba Marathon in Winnipeg, Canada. All runners were classified, for purposes of the study, as "non-elite," meaning they participated on a casual, non-professional basis, with limited or no training. Prior to the marathon, each study participant underwent a comprehensive health screening, including blood tests to determine the levels of cardiac biomarkers, factors present in the blood that reflect the health of the heart muscle. Following the race, additional blood samples were taken and echocardiograms and CMR were performed.

Earlier studies have confirmed that cardiac biomarkers are elevated in many casual, non-professional athletes following competition, indicating possible damage to the heart muscle. In this study, echocardiograms and CMR performed immediately after competition revealed abnormalities, including irregularities in diastolic filling (relaxation abnormalities) on both sides of the heart and a decrease from 64 percent to 43 percent in the pumping function of the right ventricle. Although the cardiac biomarkers were elevated post marathon, there was no evidence of direct permanent injury to the heart muscle on CMR imaging.

"By using CMR, we were able to definitively show that these fluctuations do not result in any true damage of the heart, and the right ventricular dysfunction is transient, recovering one week following the race," Dr. Jassal noted.

The researchers are planning additional studies to determine whether these abnormalities may result in permanent damage in runners who participate in more than one marathon during a 12-month period.


Story Source:

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


Cite This Page:

American Thoracic Society. "Temporary Transient Heart Dysfunction Found In Some Long-distance Runners." ScienceDaily. ScienceDaily, 19 May 2009. <www.sciencedaily.com/releases/2009/05/090517143229.htm>.
American Thoracic Society. (2009, May 19). Temporary Transient Heart Dysfunction Found In Some Long-distance Runners. ScienceDaily. Retrieved October 31, 2014 from www.sciencedaily.com/releases/2009/05/090517143229.htm
American Thoracic Society. "Temporary Transient Heart Dysfunction Found In Some Long-distance Runners." ScienceDaily. www.sciencedaily.com/releases/2009/05/090517143229.htm (accessed October 31, 2014).

Share This



More Health & Medicine News

Friday, October 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

U.S. Ebola Response Measures Demonstrated

U.S. Ebola Response Measures Demonstrated

AP (Oct. 31, 2014) Officials in the Washington area showed off Ebola response measures being taken at Dulles International Airport and the National Institutes of Health. (Oct. 31) Video provided by AP
Powered by NewsLook.com
Fauci Says Ebola Risk in US "essentially Zero"

Fauci Says Ebola Risk in US "essentially Zero"

AP (Oct. 30, 2014) NIAID Director Anthony Fauci said the risk of Ebola becoming an epidemic in the U.S. is essentially zero Thursday at the Washington Ideas Forum. He also said an Ebola vaccine will be tested in West Africa in the next few months. (Oct. 30) Video provided by AP
Powered by NewsLook.com
Nurse Defies Ebola Quarantine With Bike Ride

Nurse Defies Ebola Quarantine With Bike Ride

AP (Oct. 30, 2014) A nurse who vowed to defy Maine's voluntary quarantine for health care workers who treated Ebola patients followed through on her promise Thursday, leaving her home for an hour-long bike ride. (Oct. 30) Video provided by AP
Powered by NewsLook.com
Pot-Infused Edibles Raise Concerns in Colorado

Pot-Infused Edibles Raise Concerns in Colorado

AFP (Oct. 30, 2014) Colorado may have legalized marijuana for recreational use, but the debate around the decision still continues, with a recent - failed - attempt to ban cannabis-infused edibles. Duration: 01:53 Video provided by AFP
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