title: Cardiac markers (BNP, NT-pro-BNP, Troponin I, Troponin T, in female amateur runners before and up until three days after a marathon.
abstract: OBJECTIVE
  Transient cardiac ventricular dysfunction or sudden cardiac deaths have been reported for male athletes participating in marathon racing. Less is known about the myocardial response in females. We examined natriuretic peptides and cardiac troponins in female athletes after a marathon.
  
  
  METHODS
  At the 31st real,- Berlin Marathon plasma levels of NT-pro-BNP, BNP, cTnI and cTnT were measured in 15 women (age 35+/-6 years; finishing times between 3:22 h and 5:21 h) at four different time points (before, immediately after, day one and day three).
  
  
  RESULTS
  An increase in [NT-pro-BNP] was observed immediately after the marathon (median [NT-pro-BNP] before: 39.6 pg ml(-1), after: 138.6 pg ml(-1), p=0.003) with a further increase on day one. [BNP] did not increase immediately after the marathon but increased on day one (median [BNP] before: 15 pg ml(-1), day one: 27.35 pg ml(-1), p=0.006). On day three, [NT-pro-BNP] and [BNP] returned to initial values. [cTnI] was under the detection limit prior to the marathon in all runners. [cTnT] was under the detection limit before the marathon except in one runner who presented a concentration of 0.03 ng ml(-1). Cardiac troponins (median [cTnl] after: 0.098 ng ml(-1), p=0.028; median [cTnT] after: 0.032 ng ml(-1), p=0.012) increased immediately after the marathon and returned to initial values on day one [cTnT] and three [cTnI].
  
  
  CONCLUSIONS
  Parameters representing cardiac stress increased in females after a marathon. Different kinetics of natriuretic peptides BNP and NT-pro-BNP post-marathon could be due to their different half-lives and dependence on renal function. The increase of cTnI and cTnT may result from minor myocardial lesions.
authors.affiliation: Center for Space Medicine Berlin (ZWMB), Department of Physiology, Charité - University Medicine Berlin, Campus Benjamin Franklin, Berlin, Germany. waltraud.fraszl@charite.de
authors.forename: W
authors.initials: W
authors.lastname: Frassl
authors.forename: R
authors.initials: R
authors.lastname: Kowoll
authors.forename: N
authors.initials: N
authors.lastname: Katz
authors.forename: M
authors.initials: M
authors.lastname: Speth
authors.forename: A
authors.initials: A
authors.lastname: Stangl
authors.forename: L
authors.initials: L
authors.lastname: Brechtel
authors.forename: B
authors.initials: B
authors.lastname: Joscht
authors.forename: L H
authors.initials: LH
authors.lastname: Boldt
authors.forename: R
authors.initials: R
authors.lastname: Meier-Buttermilch
authors.forename: M
authors.initials: M
authors.lastname: Schlemmer
authors.forename: L
authors.initials: L
authors.lastname: Roecker
authors.forename: H C
authors.initials: HC
authors.lastname: Gunga
mesh_terms: D000328:Adult; D015415:Biomarkers / Q000097:blood*; D002320:Cardiovascular Physiological Phenomena; D005260:Female; D006801:Humans; D008875:Middle Aged; D020097:Natriuretic Peptide, Brain / Q000097:blood*; D010446:Peptide Fragments / Q000097:blood*; D005082:Physical Exertion / Q000502:physiology; D012420:Running / Q000502:physiology*; D013997:Time Factors; D019210:Troponin I / Q000097:blood*; D020107:Troponin T / Q000097:blood*
chemical_list: D015415:Biomarkers; D010446:Peptide Fragments; D019210:Troponin I; D020107:Troponin T; C109794:pro-brain natriuretic peptide (1-76); D020097:Natriuretic Peptide, Brain