title: Cardiorespiratory requirements and reproducibility of the six-minute walk test in elderly patients with coronary artery disease.
abstract: OBJECTIVE
  To measure the cardiorespiratory requirements of the six-minute walk test (6MWT), to compare this demand with the symptom-limited exercise test (SLET) at ventilatory threshold and at maximal level in elderly patients with coronary artery disease (CAD), and to assess the reproducibility of the 6MWT in cardiorespiratory exchanges in those patients.
  
  
  METHODS
  Comparative and reproducibility sample.
  
  
  METHODS
  Cardiac rehabilitation service.
  
  
  METHODS
  Twenty-five people with CAD.
  
  
  METHODS
  Subjects performed an SLET and a 6MWT. To test 6MWT reproducibility, 9 patients performed 2 repeated 6MWTs.
  
  
  METHODS
  The 6MWT cardiorespiratory values, measured with a portable gas analyzer, were compared with the SLET data and with the data from the 2 repeated 6MWTs.
  
  
  RESULTS
  The 6MWT peak oxygen uptake (VO2peak, 14.27+/-2.94 mL.min(-1).kg(-1)) and heart rate (94+/-14 beats/min) did not differ from the SLET values at ventilatory threshold (VO2, 13.4+/-2.65 mL.min(-1).kg(-1); heart rate, 91+/-17 beats/min), whereas the 6MWT ventilation (VEpeak, 36.72+/-10.03 L/min) was higher than the SLET at ventilatory threshold (Ve, 31.54+/-8.93 L/min, P<.03). Maximal 6MWT cardiorespiratory data were lower than the SLET maximal values. Cardiorespiratory values did not differ between the 2 repeated 6MWT (VO2peak, 15.33+/-3.52 mL.min(-1).kg(-1) vs 15.11+/-2.65 mL.min(-1).kg(-1); VEpeak, 39.07+/-12.33 L/min vs 39.07+/-12.13 L/min; heart rate, 95+/-21 beats/min vs 89+/-15 beats/min).
  
  
  CONCLUSIONS
  The 6MWT cardiorespiratory requirement values did not differ from SLET values at ventilatory threshold except for ventilation, and 6MWT values are reproducible in elderly patients with CAD.
authors.affiliation: Laboratiore de Recherche EA: 3300 APS et Condiutes Motrices: Adaptations et Réadaptations, Faculté des Sciences du Sport, Université de Picardie Jules Verne, Amiens, France.
authors.forename: Mathieu
authors.initials: M
authors.lastname: Gayda
authors.forename: Abdou
authors.initials: A
authors.lastname: Temfemo
authors.forename: Dominique
authors.initials: D
authors.lastname: Choquet
authors.forename: Saïd
authors.initials: S
authors.lastname: Ahmaïdi
mesh_terms: D000367:Age Factors; D000368:Aged; D015308:Anaerobic Threshold; D000704:Analysis of Variance; D001944:Breath Tests / Q000379:methods*; D003324:Coronary Artery Disease / Q000175:diagnosis* / Q000378:metabolism / Q000503:physiopathology; D005080:Exercise Test / Q000379:methods* / Q000592:standards; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D010101:Oxygen Consumption; D011659:Pulmonary Gas Exchange; D012123:Pulmonary Ventilation; D018709:Statistics, Nonparametric; D013318:Stroke Volume; D013686:Telemetry / Q000379:methods* / Q000592:standards; D013997:Time Factors; D016277:Ventricular Function, Left; D016138:Walking / Q000502:physiology