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Mechanism of Dyspnea during Exercise in Children with Corrected Congenital Heart Disease

This study will evaluate cardiorespiratory and peripheral muscle function and their relationship with subjective dyspnea threshold after the surgical correction of congenital heart disease in children. Thirteen children with surgically repaired congenital heart disease were recruited. Each participa...

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Autores principales: Chlif, Mehdi, Ammar, Mohamed Mustapha, Said, Noureddine Ben, Sergey, Levushkin, Ahmaidi, Said, Alassery, Fawaz, Hamam, Habib
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8751078/
https://www.ncbi.nlm.nih.gov/pubmed/35010359
http://dx.doi.org/10.3390/ijerph19010099
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author Chlif, Mehdi
Ammar, Mohamed Mustapha
Said, Noureddine Ben
Sergey, Levushkin
Ahmaidi, Said
Alassery, Fawaz
Hamam, Habib
author_facet Chlif, Mehdi
Ammar, Mohamed Mustapha
Said, Noureddine Ben
Sergey, Levushkin
Ahmaidi, Said
Alassery, Fawaz
Hamam, Habib
author_sort Chlif, Mehdi
collection PubMed
description This study will evaluate cardiorespiratory and peripheral muscle function and their relationship with subjective dyspnea threshold after the surgical correction of congenital heart disease in children. Thirteen children with surgically repaired congenital heart disease were recruited. Each participant performed an incremental exercise test on a cycle ergometer until exhaustion. Gas exchanges were continuously sampled to measure the maximal aerobic parameters and ventilatory thresholds. The functional capacity of the subjects was assessed with a 6 min walk test. At the end of the exercise test, isokinetic Cybex Norm was used to evaluate the strength and endurance of the knee extensor muscle in the leg. Dyspnea was subjectively scored with a visual analog scale during the last 15 s of each exercise step. Oxygen consumption measured at the dyspnea score/VO(2) relationship located at the dyspnea threshold, at which dyspnea suddenly increased. Results: The maximal and submaximal values of the parameters describing the exercise and the peripheral muscular performances were: VO(2) Peak: 33.8 ± 8.9 mL·min(−1)·kg(−1); HR: 174 ± 9 b·min(−1); VEmax: 65.68 ± 15.9 L·min(−1); P max: 117 ± 27 W; maximal voluntary isometric force MVIF: 120.8 ± 41.9 N/m; and time to exhaustion Tlim: 53 ± 21 s. Oxygen consumption measured at the dyspnea threshold was related to VO(2) Peak (R(2) = 0.74; p < 0.01), Tlim (R(2) = 0.78; p < 0.01), and the distance achieved during the 6MWT (R(2) = 0.57; p < 0.05). Compared to the theoretical maximal values for the power output, VO(2), and HR, the surgical correction did not repair the exercise performance. After the surgical correction of congenital heart disease, exercise performance was impeded by alterations of the cardiorespiratory function and peripheral local factors. A subjective evaluation of the dyspnea threshold is a reliable criterion that allows the prediction of exercise capacity in subjects suffering from congenital heart disease.
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spelling pubmed-87510782022-01-12 Mechanism of Dyspnea during Exercise in Children with Corrected Congenital Heart Disease Chlif, Mehdi Ammar, Mohamed Mustapha Said, Noureddine Ben Sergey, Levushkin Ahmaidi, Said Alassery, Fawaz Hamam, Habib Int J Environ Res Public Health Article This study will evaluate cardiorespiratory and peripheral muscle function and their relationship with subjective dyspnea threshold after the surgical correction of congenital heart disease in children. Thirteen children with surgically repaired congenital heart disease were recruited. Each participant performed an incremental exercise test on a cycle ergometer until exhaustion. Gas exchanges were continuously sampled to measure the maximal aerobic parameters and ventilatory thresholds. The functional capacity of the subjects was assessed with a 6 min walk test. At the end of the exercise test, isokinetic Cybex Norm was used to evaluate the strength and endurance of the knee extensor muscle in the leg. Dyspnea was subjectively scored with a visual analog scale during the last 15 s of each exercise step. Oxygen consumption measured at the dyspnea score/VO(2) relationship located at the dyspnea threshold, at which dyspnea suddenly increased. Results: The maximal and submaximal values of the parameters describing the exercise and the peripheral muscular performances were: VO(2) Peak: 33.8 ± 8.9 mL·min(−1)·kg(−1); HR: 174 ± 9 b·min(−1); VEmax: 65.68 ± 15.9 L·min(−1); P max: 117 ± 27 W; maximal voluntary isometric force MVIF: 120.8 ± 41.9 N/m; and time to exhaustion Tlim: 53 ± 21 s. Oxygen consumption measured at the dyspnea threshold was related to VO(2) Peak (R(2) = 0.74; p < 0.01), Tlim (R(2) = 0.78; p < 0.01), and the distance achieved during the 6MWT (R(2) = 0.57; p < 0.05). Compared to the theoretical maximal values for the power output, VO(2), and HR, the surgical correction did not repair the exercise performance. After the surgical correction of congenital heart disease, exercise performance was impeded by alterations of the cardiorespiratory function and peripheral local factors. A subjective evaluation of the dyspnea threshold is a reliable criterion that allows the prediction of exercise capacity in subjects suffering from congenital heart disease. MDPI 2021-12-23 /pmc/articles/PMC8751078/ /pubmed/35010359 http://dx.doi.org/10.3390/ijerph19010099 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Chlif, Mehdi
Ammar, Mohamed Mustapha
Said, Noureddine Ben
Sergey, Levushkin
Ahmaidi, Said
Alassery, Fawaz
Hamam, Habib
Mechanism of Dyspnea during Exercise in Children with Corrected Congenital Heart Disease
title Mechanism of Dyspnea during Exercise in Children with Corrected Congenital Heart Disease
title_full Mechanism of Dyspnea during Exercise in Children with Corrected Congenital Heart Disease
title_fullStr Mechanism of Dyspnea during Exercise in Children with Corrected Congenital Heart Disease
title_full_unstemmed Mechanism of Dyspnea during Exercise in Children with Corrected Congenital Heart Disease
title_short Mechanism of Dyspnea during Exercise in Children with Corrected Congenital Heart Disease
title_sort mechanism of dyspnea during exercise in children with corrected congenital heart disease
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8751078/
https://www.ncbi.nlm.nih.gov/pubmed/35010359
http://dx.doi.org/10.3390/ijerph19010099
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