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Cardiac fatigue in ...
Cardiac fatigue in long-distance runners is associated with ventricular repolarization abnormalities.
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- Sahlén, Anders (författare)
- Karolinska Institutet
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Rubulis, Aigars, 1974 (författare)
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- Winter, Reidar (författare)
- Karolinska Institutet
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Jacobsen, Per-Herman (författare)
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StÃ¥hlberg, Marcus (författare)
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- Tornvall, Per (författare)
- Karolinska Institutet
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- Bergfeldt, Lennart, 1950 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för molekylär och klinisk medicin,Institute of Medicine, Department of Molecular and Clinical Medicine
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- Braunschweig, Frieder (författare)
- Karolinska Institutet
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- Stahlberg, M (författare)
- Karolinska Institutet
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(creator_code:org_t)
- Elsevier BV, 2009
- 2009
- Engelska.
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Ingår i: Heart rhythm : the official journal of the Heart Rhythm Society. - : Elsevier BV. - 1556-3871 .- 1547-5271. ; 6:4, s. 512-9
- Relaterad länk:
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https://gup.ub.gu.se...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- BACKGROUND: Prolonged exercise can induce cardiac fatigue, which is characterized by biomarker release and impaired myocardial function. The impact on ventricular electrophysiology is largely unknown. OBJECTIVE: The objective of this study was to examine changes in ventricular repolarization after a 30-km cross-country race in runners aged >or=55 years. METHODS: Fifteen healthy participants (62 +/- 5 years) were assessed using biomarkers (N-terminal pro-brain natriuretic peptide [NT-proBNP], troponin T [TnT]), tissue Doppler echocardiography, and vectorcardiography at baseline, within 1 hour postrace and on days 1 and 6 postrace. RESULTS: During the race, NT-proBNP increased from 42 ng/L (interquartile range 25-117) to 187 ng/L (113-464), and TnT increased from undetectable levels to 0.03 microg/L (0.015-0.05). Global strain (19.1% +/- 2.2%) decreased on day 1 (17.2% +/- 1.8%) and day 6 (17.9% +/- 1.5%; P <.01). QT(c) increased from 431 +/- 15 ms prerace to 445 +/- 22 ms postrace and 445 +/- 15 ms on day 1 (P <.05), mainly because of an increased T(peak-end) interval (prerace 108 +/- 13 ms, postrace 127 +/- 43 ms, day 1 127 +/- 43 ms; P <.05). Postrace, T(area) (baseline 75 +/- 26 microVs) peaked on day 1 (105 +/- 42 microVs) and remained high on day 6 (89 +/- 37 microVs; P <.05). Runners with higher baseline NT-proBNP developed greater impairment of myocardial velocities (rho = -0.68 to -0.54; P <.05) and a larger increase in T(area) (rho = 0.73; P <.01). CONCLUSION: Cardiac fatigue induced by prolonged exertion is associated with sustained abnormalities in ventricular repolarization. Runners with higher baseline NT-proBNP are especially liable to such alterations of cardiac function.
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- Av författaren/redakt...
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Sahlén, Anders
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Rubulis, Aigars, ...
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Winter, Reidar
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Jacobsen, Per-He ...
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Ståhlberg, Marc ...
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Tornvall, Per
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Bergfeldt, Lenna ...
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Braunschweig, Fr ...
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Stahlberg, M
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- Artiklar i publikationen
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Heart rhythm : t ...
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Heart Rhythm
- Av lärosätet
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Göteborgs universitet
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Karolinska Institutet