title: Cardiac fatigue and oxygen kinetics after prolonged exercise.
abstract: BACKGROUND
  Although the underlying mechanisms responsible for cardiac dysfunction after prolonged exercise remains to be elucidated, it has reported cardiac deterioration following exhaustive exercise in the absence of underlying cardiovascular diseases, which has been attributed to cardiac fatigue. The study was designed to investigate the effects of after fatiguing exercise on oxygen kinetics.
  
  
  METHODS
  Six athletes have taken examination, firstly by echocardiography, secondly by cardiopulmonary exercise testing and then by near-infrared spectroscopy (NIRS), before 2 days (pre-race) and after 1 day (post-race) marathon competition.
  
  
  RESULTS
  We found decrease in left ventricular systolic and diastolic functions, and peak oxygen consumption while increasing half time of muscular oxygen delivery after race period.
  
  
  CONCLUSIONS
  Cardiopulmonary exercise testing in conjunction with oxygen kinetics of skeletal muscle measured by NIRS may be a tool for detecting cardiac fatigue.
authors.forename: Erdem
authors.initials: E
authors.lastname: Kasikcioglu
authors.forename: Armagan
authors.initials: A
authors.lastname: Arslan
authors.forename: Berrin
authors.initials: B
authors.lastname: Topcu
authors.forename: Omer
authors.initials: O
authors.lastname: Sayli
authors.forename: Hulya
authors.initials: H
authors.lastname: Akhan
authors.forename: Huseyin
authors.initials: H
authors.lastname: Oflaz
authors.forename: Ata
authors.initials: A
authors.lastname: Akin
authors.forename: Abidin
authors.initials: A
authors.lastname: Kayserilioglu
authors.forename: Mehmet
authors.initials: M
authors.lastname: Meric
mesh_terms: D000328:Adult; D015444:Exercise / Q000502:physiology*; D006801:Humans; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D010100:Oxygen / Q000378:metabolism*; D010101:Oxygen Consumption / Q000502:physiology; D019265:Spectroscopy, Near-Infrared; D018487:Ventricular Dysfunction, Left / Q000503:physiopathology*; D016277:Ventricular Function, Left / Q000502:physiology
chemical_list: D010100:Oxygen