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    Biological markers of cardiac damage are not related to measures of cardiac systolic and diastolic function using cardiovascular magnetic resonance and echocardiography after an acute bout of prolonged endurance exercise.

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    Authors
    Wilson, Mathew
    O'Hanlon, R.
    Prasad, S.
    Oxborough, D.
    Godfrey, R.J.
    Alpendurada, F
    Smith, G.
    Wong, J.
    Basavarajaiah, S.
    Sharma, S.
    Nevill, Alan M.
    Gaze, David
    George, Keith
    Whyte, Gregory P.
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    Issue Date
    2010
    
    Metadata
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    Abstract
    Objectives Seventeen male participants (mean (SD) (range): age 33.5 (6.5) years (46-26 years), body mass 80 (9.2) kg (100-63 kg), height 1.81 (0.06) m (1.93- 1.70 m)) ran a marathon to investigate the relationship between systolic function (using cardiac magnetic resonance (CMR)) and diastolic function (using echocardiography) against biomarkers of cardiac damage. Methods Echocardiographic and cardiac troponin I (cTnI)/N-terminal pro-B-type natriuretic peptide (NTproBNP) data were collected 24 h premarathon, immediately postmarathon and 6 h postmarathon. CMR data were collected 24 h premarathon and at 6 h postmarathon. Results Body mass was significantly reduced postmarathon (80 (9.2) vs 78.8 (8.6) kg; p<0.001). There was a significant E/A reduction postmarathon (1.11 (0.34) vs 1.72 (0.44); p<0.05) that remained depressed 6 h postmarathon (1.49 (0.43); p<0.05). CMR demonstrated left ventricular end-diastolic and end-systolic volumes were reduced postmarathon, with a preserved stroke volume. Left ventricular ejection fraction 6 h postmarathon significantly increased (64.4% (4.2%) vs 67.4% (5%); p<0.05). There were significant elevations in cTnI (0.00 vs 0.04 (0.03) mug/l; p<0.05) and NTproBNP (37.4 (24.15) ng/l vs 59.34 (43.3) ng/l; p<0.05) immediately postmarathon. Eight runners had cTnI elevations immediately postmarathon above acute myocardial infarction cutoff levels (>/=0.03 mug/l). No correlations between cTnI/NTproBNP and measures of diastolic function (E, A, E/A, isovolumic relaxation time, E deceleration time and E/E') or measures of systolic function (stroke volume or ejection fraction) were observed immediately postmarathon or 6 h postmarathon. Conclusions Biomarkers of cardiac damage after prolonged exercise are not associated with either systolic or diastolic functional measures.
    Citation
    British journal of sports medicine, Published Online First 23 October 2009
    Publisher
    BMJ Publishing
    Journal
    British journal of sports medicine
    URI
    http://hdl.handle.net/2436/107235
    DOI
    10.1136/bjsm.2009.064089
    PubMed ID
    19854761
    Type
    Journal article
    Language
    en
    Description
    Epub ahead of print
    ISSN
    0306-3674
    EISSN
    1473-0480
    ae974a485f413a2113503eed53cd6c53
    10.1136/bjsm.2009.064089
    Scopus Count
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