title: [Comparative analysis between cardiopulmonary exercise testing and echocardiography in patients of heart failure with normal ejection fraction].
abstract: OBJECTIVE
  To assess the clinical and predictive value of cardiopulmonary exercise testing (CPET) used in heart failure with normal left ventricular ejection fraction (HFNEF).
  
  
  METHODS
  A total of 49 HFNEF patients of (New York Heart Association) NYHA class II were randomly selected from September 2010 to July 2012. The parameters of CPET and ultrasonic cardiogram (UCG) were collected at Day 3 post-admission. Person's and partial correlations were used to perform to compare CPET and UCG.
  
  
  RESULTS
  Pearson's correlation revealed that mitral peak velocity of early filling/early diastolic mitral annular velocity (E/E', 10.14 ± 2.05) was significantly correlated with peak oxygen uptake (VO₂ peak, (24.15 ± 8.31) ml×kg⁻¹×min⁻¹, r = -0.287, P = 0.046), carbon dioxide production (VCO₂, (1.63 ± 0.51) L/min, r = -0.429, P = 0.002), partial pressure of end-tidal carbon dioxide (PET CO₂, (39.50 ± 7.77) mm Hg, r = -0.282, P = 0.050) and minute ventilation/carbon dioxide production (VE/VCO₂, 31.69 ± 5.32, r = 0.411, P = 0.003). Early diastolic mitral annular velocity (E', (6.46 ± 1.60) cm/s) was relevant to VO₂ peak (r = 0.351, P = 0.013), VCO(2) (r = 0.452, P = 0.001), PET CO₂ (r = 0.310, P = 0.030), VE/VCO₂ (r = -0.434, P = 0.002) and respiratory exchange ratio (RER, 1.18 ± 0.13, r = 0.350, P = 0.014). After adjustment, VCO₂ was correlated with E/E' (r = -0.369, P = 0.019) and E' (r = 0.393, P = 0.010). VE/VCO₂ was relevant to E/E' (r = 0.414, P = 0.006) and E' (r = -0.334, P = 0.031).
  
  
  CONCLUSIONS
  For HFNFE patients, CPET has high values of assessment and prognosis.
authors: Affiliated Hangzhou Hospital of Nanjing Medical University, Hangzhou First People's Hospital, China.
authors: Ya-qi
authors: YQ
authors: Ren
authors: Ning-fu
authors: NF
authors: Wang
authors: Hao
authors: H
authors: Pan
authors: Li-li
authors: LL
authors: Wang
authors: Yi-gang
authors: YG
authors: Zhong
authors: Zhan-lin
authors: ZL
authors: Zhou
mesh_terms: D000368:Aged; D004452:Echocardiography; D005080:Exercise Test; D005260:Female; D006333:Heart Failure / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D013318:Stroke Volume