Glance at Sees Transient Heart Dysfunction In Some Long-Distance Runners
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A cutting edge discover using advanced cardiac imaging technology indicates that cardiac abnormalities experienced by some marathon runners following competition are temporary, and cause not result in damage to the emotions muscle. The study, conducted by researchers at the University of Manitoba, marked the ahead account of cardiac magnetic resonance imaging, or CMR, in a post-marathon setting.
The evaluation was presented on Sunday, May 17, at the 105th International Convention of the American Thoracic Society in San Diego.
"Although previous studies of marathon runners carry demonstrated biochemical evidence of cardiac injury and get correlated these findings with echocardiographic evidence of cardiac dysfunction, this was the inceptive age CMR has been used to very 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 Universal Hospital Research Middle in Winnipeg.
The study examined the cardiac health of 14 runners who participated in the complete 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 community or no training. Prior to the marathon, each study participant underwent a entire health screening, including blood tests to actuate the levels of cardiac biomarkers, factors present in the blood that reflect the health of the love muscle. Following the race, further blood samples were taken and echocardiograms and CMR were performed.
Earlier studies have confirmed that cardiac biomarkers are elevated in multiplied casual, non-professional athletes following competition, indicating possible damage to the feelings muscle. In this study, echocardiograms and CMR performed straightaway 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 avail of the right ventricle. Although the cardiac biomarkers were elevated assign marathon, there was no evidence of regulate permanent injury to the passion muscle on CMR imaging.
"By using CMR, we were able to definitively show that these fluctuations determine not backwash in any correct 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 cinch whether these abnormalities may consummation in permanent damage in runners who participate in deeper than one marathon during a 12-month period.
American Thoracic State
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