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Influence of Low Peak Respiratory Exchange Ratio on Cardiac Rehabilitation in Patients With Coronary Artery Disease

OBJECTIVE: To compare and analyze the effects of cardiac rehabilitation (CR) in two groups based on the peak respiratory exchange ratio (RER(peak)) 1.1 values using the exercise tolerance test (ETT) results, and to investigate the reasons for early termination of ETT. METHODS: Patients with acute co...

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Autores principales: Kim, Chul, Choi, Hee Eun, Lee, Ki Hoon, Kim, Young Joo, Lee, Sang Jae
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Korean Academy of Rehabilitation Medicine 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5256319/
https://www.ncbi.nlm.nih.gov/pubmed/28119843
http://dx.doi.org/10.5535/arm.2016.40.6.1114
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author Kim, Chul
Choi, Hee Eun
Lee, Ki Hoon
Kim, Young Joo
Lee, Sang Jae
author_facet Kim, Chul
Choi, Hee Eun
Lee, Ki Hoon
Kim, Young Joo
Lee, Sang Jae
author_sort Kim, Chul
collection PubMed
description OBJECTIVE: To compare and analyze the effects of cardiac rehabilitation (CR) in two groups based on the peak respiratory exchange ratio (RER(peak)) 1.1 values using the exercise tolerance test (ETT) results, and to investigate the reasons for early termination of ETT. METHODS: Patients with acute coronary syndrome who participated in CR exercise training were selected and all subjects underwent 6 weeks of CR exercise training. ETT was performed on a treadmill using a Modified Bruce Protocol before and after CR exercise training. According to the result of the first ETT, the subjects were divided into two groups: those with an RER(peak)≥1.1 (n=33) and those with an RER(peak)<1.1 (n=22). We investigated the reasons for ETT termination and compared the effect of CR between the groups. RESULTS: The reasons for the early termination of the first ETT in the RER(peak)<1.1 group were subjective dyspnea, abnormal cardiovascular responses, leg fatigue and other problems. After a 6-week CR, the peak oxygen consumption (VO(2peak)) and ETT time increased, and the rate of perceived exertion (RPE) and RPP (rate pressure product) at stage 3 decreased in both the RER(peak)<1.1 and RER(peak)≥1.1 groups. CONCLUSION: CR exercise training improved exercise capacity, not only in the RER(peak)≥1.1 group, but also in the RER(peak)<1.1 group. This means that patients with a lower exercise tolerance could also benefit from the effects of CR. Thoughtful consideration to identify the direct and indirect causes for the early termination of ETT would be necessary to improve the efficiency of CR.
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spelling pubmed-52563192017-01-24 Influence of Low Peak Respiratory Exchange Ratio on Cardiac Rehabilitation in Patients With Coronary Artery Disease Kim, Chul Choi, Hee Eun Lee, Ki Hoon Kim, Young Joo Lee, Sang Jae Ann Rehabil Med Original Article OBJECTIVE: To compare and analyze the effects of cardiac rehabilitation (CR) in two groups based on the peak respiratory exchange ratio (RER(peak)) 1.1 values using the exercise tolerance test (ETT) results, and to investigate the reasons for early termination of ETT. METHODS: Patients with acute coronary syndrome who participated in CR exercise training were selected and all subjects underwent 6 weeks of CR exercise training. ETT was performed on a treadmill using a Modified Bruce Protocol before and after CR exercise training. According to the result of the first ETT, the subjects were divided into two groups: those with an RER(peak)≥1.1 (n=33) and those with an RER(peak)<1.1 (n=22). We investigated the reasons for ETT termination and compared the effect of CR between the groups. RESULTS: The reasons for the early termination of the first ETT in the RER(peak)<1.1 group were subjective dyspnea, abnormal cardiovascular responses, leg fatigue and other problems. After a 6-week CR, the peak oxygen consumption (VO(2peak)) and ETT time increased, and the rate of perceived exertion (RPE) and RPP (rate pressure product) at stage 3 decreased in both the RER(peak)<1.1 and RER(peak)≥1.1 groups. CONCLUSION: CR exercise training improved exercise capacity, not only in the RER(peak)≥1.1 group, but also in the RER(peak)<1.1 group. This means that patients with a lower exercise tolerance could also benefit from the effects of CR. Thoughtful consideration to identify the direct and indirect causes for the early termination of ETT would be necessary to improve the efficiency of CR. Korean Academy of Rehabilitation Medicine 2016-12 2016-12-30 /pmc/articles/PMC5256319/ /pubmed/28119843 http://dx.doi.org/10.5535/arm.2016.40.6.1114 Text en Copyright © 2016 by Korean Academy of Rehabilitation Medicine http://creativecommons.org/licenses/by-nc/4.0 This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Kim, Chul
Choi, Hee Eun
Lee, Ki Hoon
Kim, Young Joo
Lee, Sang Jae
Influence of Low Peak Respiratory Exchange Ratio on Cardiac Rehabilitation in Patients With Coronary Artery Disease
title Influence of Low Peak Respiratory Exchange Ratio on Cardiac Rehabilitation in Patients With Coronary Artery Disease
title_full Influence of Low Peak Respiratory Exchange Ratio on Cardiac Rehabilitation in Patients With Coronary Artery Disease
title_fullStr Influence of Low Peak Respiratory Exchange Ratio on Cardiac Rehabilitation in Patients With Coronary Artery Disease
title_full_unstemmed Influence of Low Peak Respiratory Exchange Ratio on Cardiac Rehabilitation in Patients With Coronary Artery Disease
title_short Influence of Low Peak Respiratory Exchange Ratio on Cardiac Rehabilitation in Patients With Coronary Artery Disease
title_sort influence of low peak respiratory exchange ratio on cardiac rehabilitation in patients with coronary artery disease
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5256319/
https://www.ncbi.nlm.nih.gov/pubmed/28119843
http://dx.doi.org/10.5535/arm.2016.40.6.1114
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