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Echocardiographic Findings and Cardiac Biomarkers in Non-Elite Triathletes – Data from the Kalmar Ironwoman Study
Linnaeus University, Faculty of Health and Life Sciences, Department of Health and Caring Sciences.
Linnaeus University, Faculty of Social Sciences, Department of Sport Science.ORCID iD: 0000-0002-1626-4575
Linnaeus University, Faculty of Social Sciences, Department of Sport Science.ORCID iD: 0000-0003-4934-8684
Kalmar County Hospital.
2018 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

INTRODUCTION: There is an ongoing debate about the impact of endurance exercise on cardiovascular health. Not at least data on cardiac biomarker changes (e.g. troponin T (cTnT), N-terminal prohormone of brain natriuretic peptide (NT-proBNP) and cardiac specific myosin heavy chain-alpha (MHC-α) have raised questions about exercise related cardiac injury. METHODS: In 52 non-elite athletes (14 female, 38 male; age 41.1 ± 9.7, range 24-70 years; all completed the race) biomarkers were measured by standard laboratory methods 7 days before, directly after, and day 1, 4 and 6 after a full Ironman distance triathlon (Swim 3.9 km, Bike 180 km, Run 42.2 km) . In 19 of these athletes (9 female, 10 male) echocardiography with 30 different standard measurements was performed before and directly after the race. RESULTS: Only MHC-α [µg/L] showed a two-peaked increase directly after (2.57 ± 0.78) and on day 4 (2.74 ± 0.55). Other biomarkers showed a one-peaked increase with maximal values either directly after the race or at day 1: cTnT 76 ± 80 ng/L (12-440; reference <15), NT-proBNP 776 ± 684 ng/L (92-4700; ref. < 300), CK 68 ± 55 µkat/L (5-280; ref. < 1.9), MG 2088 ± 2350 µg/L (130-17000; ref.< 72), and creatinine 100 ± 20 µmol/L (74-161; ref. < 100), CRP 49 ± 23 mg/L (15-119; ref.< 5). No significant echocardiographic changes were recorded. E.g. left ventricular end diastolic diameter (49.0 ± 4.7 mm before, 47.7 ± 5.0 mm after the race, right ventricular end diastolic diameter (34.3 ± 4.3 mm before, 33.3 ± 5.7 mm after the race), right atrial area (17.5 ± 2.9 cm2 before, 17.7 ± 3.6 cm2 after the race) and left atrial area (18.8 ± 3.7 cm2 before, 17.8 ± 2.2 cm2 after the race) did not show any significant acute changes. CONCLUSION: While an Ironman leads to remarkable disturbances in biomarkers as e.g. cTnT after the race was in the range of myocardial infarction in 100% of women and 97% of men, these alterations were not correlated to any acute echocardiographic changes in heart size or function. However, the significance of biochemical evidence of cardiac injury on long-term heart function and cardiovascular health remains unclear.

Place, publisher, year, edition, pages
2018.
National Category
Cardiac and Cardiovascular Systems Sport and Fitness Sciences
Research subject
Natural Science, Medicine; Social Sciences, Sport Science
Identifiers
URN: urn:nbn:se:lnu:diva-77240OAI: oai:DiVA.org:lnu-77240DiVA, id: diva2:1241211
Conference
23rd Annual Congress of the European College of Sport Science, "Sport Science at the cutting edge", 4-7 july 2018, Dublin, Ireland
Available from: 2018-08-23 Created: 2018-08-23 Last updated: 2019-02-22Bibliographically approved

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Carlsson, JörgDanielsson, TomBergman, Patrick

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CiteExportLink to record
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Citation style
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