Document Detail


Relation of biomarkers and cardiac magnetic resonance imaging after marathon running.
MedLine Citation:
PMID:  19427448     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Although previous studies including endurance athletes after marathon running have demonstrated biochemical evidence of cardiac injury and have correlated these findings with echocardiographic evidence of cardiac dysfunction, particularly of the right ventricle, a study of marathon athletes incorporating biomarkers, echocardiography, and cardiac magnetic resonance (CMR) imaging has not been performed to date. The aim of this study was to demonstrate the cardiac changes associated with participation in a marathon using serial cardiac biomarkers, echocardiography, and CMR imaging. Fourteen participants (mean age 33 +/- 6 years, 8 men) completed the full marathon. Myoglobin, creatine kinase, and troponin T were elevated in all athletes after the race. There was a strong linear correlation between right ventricular (RV) fractional area change as assessed by echocardiography and the RV ejection fraction as assessed by CMR imaging (r = 0.96) after the marathon. RV function, using echocardiography, transiently decreased from before to after the race (RV fractional area change 43 +/- 4% vs 33 +/- 5%, p <0.05). There were also postrace changes in left ventricular and RV diastolic filling. Although RV systolic changes were transient, left ventricular and RV diastolic abnormalities persisted up to 1 week after the marathon. No evidence of delayed enhancement of the left ventricular myocardium was found on CMR imaging, suggesting that the increase in cardiac biomarkers after the marathon may not have be due to myocardial necrosis. In conclusion, RV systolic dysfunction transiently occurs after a marathon and has been validated for the first time by CMR imaging. The increase in cardiac troponin after marathon running is likely due to the cytosolic release of the biomarker, not to the true breakdown of the myocyte, as confirmed by delayed enhancement CMR imaging.
Authors:
Negareh Mousavi; Andrew Czarnecki; Kanwal Kumar; Nazanin Fallah-Rad; Matthew Lytwyn; Song-Yee Han; Andrew Francis; Jonathan R Walker; Iain D C Kirkpatrick; Tomas G Neilan; Sat Sharma; Davinder S Jassal
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-03-25
Journal Detail:
Title:  The American journal of cardiology     Volume:  103     ISSN:  1879-1913     ISO Abbreviation:  Am. J. Cardiol.     Publication Date:  2009 May 
Date Detail:
Created Date:  2009-05-11     Completed Date:  2009-06-05     Revised Date:  2010-03-30    
Medline Journal Info:
Nlm Unique ID:  0207277     Medline TA:  Am J Cardiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1467-72     Citation Subset:  AIM; IM    
Affiliation:
Section of Cardiology, Department of Cardiac Sciences, St. Boniface Research Centre, University of Manitoba, Winnipeg, Manitoba, Canada.
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MeSH Terms
Descriptor/Qualifier:
Adult
Biological Markers / blood*
Creatine Kinase / blood
Echocardiography
Female
Humans
Magnetic Resonance Imaging*
Male
Myoglobin / blood
Physical Endurance / physiology*
Prospective Studies
Running / physiology*
Troponin / blood
Ventricular Function, Right / physiology*
Chemical
Reg. No./Substance:
0/Biological Markers; 0/Myoglobin; 0/Troponin; EC 2.7.3.2/Creatine Kinase
Comments/Corrections
Comment In:
Am J Cardiol. 2010 Apr 1;105(7):1043-4   [PMID:  20346332 ]
Am J Cardiol. 2009 Sep 1;104(5):742-3   [PMID:  19699363 ]

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