Impaired Pulmonary Function is an Additional Potential Mechanism for the Reduction of Functional Capacity in Clinically Stable Fontan Patients

Pediatric Cardiology
Aída L R TurquettoMarcelo B Jatene

Abstract

Central factors negatively affect the functional capacity of Fontan patients (FP), but "non-cardiac" factors, such as pulmonary function, may contribute to their exercise intolerance. We studied the pulmonary function in asymptomatic FP and its correlations with their functional capacity. Pulmonary function and cardiopulmonary exercise tests were performed in a prospective study of 27 FP and 27 healthy controls (HC). Cardiovascular magnetic resonance was used to evaluate the Fontan circulation. The mean age at tests, the mean age at surgery, and the median follow-up time of FP were 20(±6), 8(±3), and 11(8-17) years, respectively. Dominant ventricle ejection fraction was within normal range. The mean of peak VO2 expressed in absolute values (L/min), the relative values to body weight (mL/kg/min), and their predicted values were lower in FP compared with HC: 1.69 (±0.56) vs 2.81 (±0.77) L/min; 29.9 (±6.1) vs 41.5 (±9.3) mL/kg/min p < 0.001 and predicted VO2 Peak [71% (±14) vs 100% (±20) p < 0.001]. The absolute and predicted values of the forced vital capacity (FVC), forced expiratory volume in one second (FEV1), inspiratory capacity (IC), total lung capacity (TLC), diffusion capacity of carbon monoxide of the lung (DLCO), maximu...Continue Reading

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Citations

Nov 6, 2018·American Journal of Physiology. Heart and Circulatory Physiology·Jordan A GuenetteJasmine Grewal
Apr 12, 2019·Frontiers in Pediatrics·Fabian StöckerNicole Nagdyman
Dec 12, 2019·Frontiers in Physiology·Julian Alexander HärtelMarijke Grau
Jan 13, 2019·Journal of Magnetic Resonance Imaging : JMRI·David R RutkowskiAlejandro Roldán-Alzate

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