title: [Effects of early submaximal cardiopulmonary exercise test and cardiac rehabilitation for patients with acute myocardial infarction after percutaneous coronary intervention: a comparative study].
abstract: OBJECTIVE
  To investigate the safety and effects of early submaximal cardiopulmonary exercise test (CPET) and cardiac rehabilitation for patients with acute myocardial infarction (AMI) after percutaneous coronary intervention (PCI).
  
  
  METHODS
  94 patients with AMI after PCI were randomly divided into 2 groups: exercise group undergoing anaerobic rehabilitation training based on anaerobic threshold (AT) exercise prescription for 3 months, and control group, conducting exercise according to the needs of the patients themselves. Three months later, the exercise cardiopulmonary function was evaluated.
  
  
  RESULTS
  In the first CPET 89 patients attained their anaerobic threshold (AT) and their heart rates were lower than their target heart rates following the exercise test. The oxygen consumption at the anaerobic threshold (VO2AT) 3 months later of the exercise group was [(12.6 +/- 2.9) ml x min(-1) x kg(1)], significantly greater and that before the exercise [(10.5 x 2.9) ml x min x kg(-1), P = 0.000]. The peak oxygen uptake (VO2 pea) 3 months of the exercise group was (20 +/- 4) ml x min(-1) x kg(-1), signficantly greater then that before exercise [(14 +/- 4) ml x min(-1) x kg(-1), P = 0.000]. The LAT 3 months of the exercise group was (42 +/- 16) J x s(-1), significantly higher than that before exercise p [(33 +/- 20) J x s(-1), P = 0.000]. The workload at peak level (Lpeak) 3 months of the exercise group was (89 +/- 14) J x s(-1) significantly greater than thatbefore exercise [(66 +/- 21) J x s(-1), P = 0.000]. And the VO2pea and Lpeak of 3 months later of the control group were [(19 +/- 4) ml x min(-l) x kg(-1)) and (80 +/- 14) J x s(-1)] respectively, both significantly higher than those before exercise [(14 +/- 4) ml x min(-1) x kg(-1) and (64 +/- 21) J x s(-1), both P = 0.000].
  
  
  CONCLUSIONS
  The early submaximal CPET and cardiac rehabilitation for patients with AMI after PCI are not only safe but also can improve their exercise capacity.
authors.affiliation: Department of Cardiology, Tongji Hospital Affiliated to Tongji University, Shanghai 200065, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Che
authors.forename: Le-min
authors.initials: LM
authors.lastname: Wang
authors.forename: Jin-fa
authors.initials: JF
authors.lastname: Jiang
authors.forename: Wen-jun
authors.initials: WJ
authors.lastname: Xu
authors.forename: Qi-ping
authors.initials: QP
authors.lastname: Zhang
mesh_terms: D000368:Aged; D015308:Anaerobic Threshold; D015906:Angioplasty, Balloon, Coronary; D005080:Exercise Test; D005081:Exercise Therapy / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000503:physiopathology / Q000534:rehabilitation / Q000628:therapy*