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Cardiopulmonary fitness in children with congenital heart diseases versus healthy children: A multicenter cross-sectional study

Rola, M. (Pediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier ) ; Gavotto, A. (Pediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier ) ; Guillaumont, S. (Pediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier ) ; Vincenti, M. (Pediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier ) ; Bredy, C. (Pediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier ) ; De La Villeon, G. (Pediatric and Congenital Cardiology Department, M3C Regional Reference CHD Centre, Montpellier University Hospital, Montpellier ) ; Picot, M.C. (Epidemiology and Clinical Research Department, Montpellier University Hospital, Montpellier ) ; Bertet, H. (Epidemiology and Clinical Research Department, Montpellier University Hospital, Montpellier ) ; Vandenberghe, D. (Pediatric and Congenital Cardiol ) ; Werner, O. ; Ovaert, C. ; Acar, P. ; Matecki, S. ; Amedro, P. ;
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    Objective We aimed to compare the cardiopulmonary fitness of children with congenital heart diseases (CHD) to that of age- and gender-adjusted controls. We also intended to identify clinical characteristics associated with maximum oxygen uptake (VO2 max ) in this population. Methods We included in a cross-sectional multicentre study a total of 798 children (496 CHD and 302 controls) who underwent a complete cardiopulmonary exercise test (CPET). The association of clinical characteristics with VO2 max was studied using a multivariate analysis. The study was approved by the South Mediterranean IV Ethics Committee (2009-A00423-54) and registered on ClinicalTrials.gov (NCT01202916). Informed consent was obtained from all parents. Results Mean VO2 max in the CHD group and control represented 93±20% and 107±17% of predicted values, respectively. VO2 max was significantly lower in the CHD group, overall (37.8±0.3 vs. 42.6±0.4mL/kg/min, P P max decline per year was significantly higher in CHD than in the controls overall (−0.84±0.10 vs −0.19±0.14mL/kg/min/year, P P P = 0.05) (). VO2 max was associated with body mass index, ventilatory anaerobic threshold, female gender, restrictive ventilatory disorder, right ventricle systolic hypertension, tricuspid regurgitation, the number of cardiac catheter or surgery procedures, and the presence of a genetic anomaly. Conclusions This comparative CPET study provided, for the first time, relevant values of VO2 max and their clinical determinants in the largest reported cohort of CHD children compared to a control group. Although the magnitude of the difference was not large, VO2 max among children with CHD was significantly lower than in normal children. We suggest performing CPET in routine follow-up of these patients.


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