Cardiology Research and Practice

Research Article

Expiratory Flow Limitation at Different Exercise Intensities in Coronary Artery Disease

Table 3

Resting pulmonary function, respiratory muscle strength, and CPET variables of all groups.
 RMI (n = 8)LMI (n = 12)CAD (n = 9)CG (n = 12)
Pulmonary function
 FVC, % predicted94.1 ± 9.698.8 ± 12.598.1 ± 10.1101.9 ± 9.7
 FEV1, % predicted97.5 ± 13.496.8 ± 11.5101.8 ± 6.4100.9 ± 6.0
 FEV1/FVC0.83 ± 0.050.79 ± 0.060.80 ± 0.050.78 ± 0.03
 MVV, L/min145.5 ± 27.6145.8 ± 25.1142.4 ± 17.7177.5 ± 30.4
Respiratory muscle strength
 MIP, cmH2O96.0 ± 27.298.1 ± 14.197.1 ± 10.395.5 ± 21.6
 MIP, % predicted114.9 ± 5.4111.6 ± 5.4110.5 ± 5.8113.8 ± 6.3
 MEP, cmH2O119.1 ± 31.7131.4 ± 18.1136.4 ± 19.6139.7 ± 30.9
 MEP, % predicted121 ± 5.5124.2 ± 4.4120.4 ± 6.7123.3 ± 6.4
CPET
 VAT
  VO2, mL·kg−1·min−113.5 ± 2.6+15.6 ± 4.918.9 ± 4.218.6 ± 3.9
  RER0.87 ± 0.050.90 ± 0.040.87 ± 0.090.90 ± 0.04
 Peak
  Speed, km/h5.9 ± 0.4+6.2 ± 0.56.4 ± 0.36.7 ± 0.3
  Inclination, %12.7 ± 4.714 ± 5.212.3 ± 4.817.2 ± 3.6
  VO2, mL·min−11775 ± 3831934 ± 4091998 ± 4612337 ± 543
  VO2, mL·kg−1·min−123.2 ± 6.223.7 ± 5.625.4 ± 4.930.7 ± 6.0
  VCO2, mL·min−12098 ± 4232108 ± 5042168 ± 4122624 ± 597
  VE/VVM0.46 ± 0.080.44 ± 0.080.45 ± 0.170.45 ± 0.16
  RER1.18 ± 0.071.09 ± 0.091.10 ± 0.111.10 ± 0.05
  HR, bpm127 ± 20143 ± 32143 ± 17165 ± 25
  VE/VCO2 slope32.4 ± 6.930.6 ± 3.926.6 ± 4.029.9 ± 4.3
Data are presented as mean ± SD. CPET, cardiopulmonary exercise testing; RMI, recent myocardial infarction group; LMI, late myocardial infarction group; CAD, stable coronary artery disease group; CG, control group; n, number of individuals; FVC, forced vital capacity; FEV1, forced expiratory volume in one second; MVV, maximal voluntary ventilation; MIP, maximal inspiratory pressure; ME, maximal expiratory pressure; VAT, ventilatory anaerobic threshold; VO2, oxygen uptake; RER, respiratory exchange ratio; VCO2, carbon dioxide production; VE, minute ventilation; HR, heart rate; VE/VCO2 slope, ventilatory efficiency. Significant difference in relation to CG; +Significant difference in relation to CAD (). One-way ANOVA (Tukey post hoc) was used.