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Serial exercise testing in children, adolescents and young adults with Senning repair for transposition of the great arteries
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Serial exercise testing in children, adolescents and young adults with Senning repair for transposition of the great arteries
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Journal Article
Serial exercise testing in children, adolescents and young adults with Senning repair for transposition of the great arteries
2012
Overview
Background
Patients with Senning repair for complete transposition of the great arteries (d-TGA) show an impaired exercise tolerance. Our aim was to investigate changes in exercise capacity in children, adolescents and adults with Senning operation.
Methods
Peak oxygen uptake (peak VO
2
), oxygen pulse and heart rate were assessed by cardiopulmonary exercise tests (CPET) and compared to normal values. Rates of change were calculated by linear regression analysis. Right ventricular (RV) function was assessed by echocardiography.
Results
Thirty-four patients (22 male) performed 3.5 (range 3–6) CPET with an interval of ≥ 6 months. Mean age at first assessment was 16.4 ± 4.27 years. Follow-up period averaged 6.8 ± 2 years. Exercise capacity was reduced (p<0.0005) and the decline of peak VO
2
(−1.3 ± 3.7 %/year; p=0.015) and peak oxygen pulse (−1.4 ± 3.0 %/year; p=0.011) was larger than normal, especially before adulthood and in female patients (p<0.01). During adulthood, RV contractility changes were significantly correlated with the decline of peak oxygen pulse (r= −0.504; p=0.047).
Conclusions
In patients with Senning operation for d-TGA, peak VO
2
and peak oxygen pulse decrease faster with age compared to healthy controls. This decline is most obvious during childhood and adolescence, and suggests the inability to increase stroke volume to the same extent as healthy peers during growth. Peak VO
2
and peak oxygen pulse remain relatively stable during early adulthood. However, when RV contractility decreases, a faster decline in peak oxygen pulse is observed.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
