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Reproducibility of the Self-Controlled Six-Minute Walking Test in Heart Failure Patients

INTRODUCTION: The six-minute walk test (6WT) has been proposed to be a submaximal test, but could actually demand a high level of exercise intensity from the patient, expressed by a respiratory quotient >1.0, following the guideline recommendations. Standardizing the 6WT using the Borg scale was...

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Autores principales: Guimarães, Guilherme Veiga, Carvalho, Vitor Oliveira, Bocchi, Edimar Alcides
Formato: Texto
Lenguaje:English
Publicado: Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo 2008
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2664221/
https://www.ncbi.nlm.nih.gov/pubmed/18438574
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author Guimarães, Guilherme Veiga
Carvalho, Vitor Oliveira
Bocchi, Edimar Alcides
author_facet Guimarães, Guilherme Veiga
Carvalho, Vitor Oliveira
Bocchi, Edimar Alcides
author_sort Guimarães, Guilherme Veiga
collection PubMed
description INTRODUCTION: The six-minute walk test (6WT) has been proposed to be a submaximal test, but could actually demand a high level of exercise intensity from the patient, expressed by a respiratory quotient >1.0, following the guideline recommendations. Standardizing the 6WT using the Borg scale was proposed to make sure that all patients undergo a submaximal walking test. PURPOSE: To test the reproducibility of the six-minute treadmill cardiopulmonary walk test (6CWT) using the Borg scale and to make sure that all patients undergo a submaximal test. METHODS: Twenty-three male heart failure patients (50±9 years) were included; these patients had both ischemic (5) and non-ischemic (18) heart failure with a left ventricle ejection fraction of 23±7%, were diagnosed as functional class NYHA II-III and were undergoing optimized drug therapy. Patients were guided to walk at a pace between “relatively easy and slightly tiring” (11 and 13 on Borg scale). The 6CWT using the Borg scale was performed two times on a treadmill with zero inclination and patient control of speed with an interval of 24 hours. During the sixth minute, we analyzed ventilation (VE, L/min), respiratory quotient, Oxygen consumption (VO(2), ml/kg/min), VE/VCO(2) slope, heart rate (HR, bpm), systolic blood pressure (SBP, mmHg), diastolic (DBP, mmHg) blood pressure and distance. RESULTS: The intraclass correlation coefficients at the sixth minute were: HR (r(i)=0.96, p<0.0001), VE (r(i)=0.84, p<0.0001), SBP (r(i)=0.72, p=0.001), distance (r(i)=0.88, p<0.0001), VO(2) (r(i)=0.92, p<0.0001), SlopeVE/VCO(2) (r(i)=0.86, p<0.0001) and RQ<1 (r(i)=0.6, p=0.004). CONCLUSION: Using the 6CWT with the Borg scale was reproducible, and it seems to be an appropriate method to evaluate the functional capacity of heart failure patients while making sure that they undergo a submaximal walking test.
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spelling pubmed-26642212009-05-13 Reproducibility of the Self-Controlled Six-Minute Walking Test in Heart Failure Patients Guimarães, Guilherme Veiga Carvalho, Vitor Oliveira Bocchi, Edimar Alcides Clinics Clinical Sciences INTRODUCTION: The six-minute walk test (6WT) has been proposed to be a submaximal test, but could actually demand a high level of exercise intensity from the patient, expressed by a respiratory quotient >1.0, following the guideline recommendations. Standardizing the 6WT using the Borg scale was proposed to make sure that all patients undergo a submaximal walking test. PURPOSE: To test the reproducibility of the six-minute treadmill cardiopulmonary walk test (6CWT) using the Borg scale and to make sure that all patients undergo a submaximal test. METHODS: Twenty-three male heart failure patients (50±9 years) were included; these patients had both ischemic (5) and non-ischemic (18) heart failure with a left ventricle ejection fraction of 23±7%, were diagnosed as functional class NYHA II-III and were undergoing optimized drug therapy. Patients were guided to walk at a pace between “relatively easy and slightly tiring” (11 and 13 on Borg scale). The 6CWT using the Borg scale was performed two times on a treadmill with zero inclination and patient control of speed with an interval of 24 hours. During the sixth minute, we analyzed ventilation (VE, L/min), respiratory quotient, Oxygen consumption (VO(2), ml/kg/min), VE/VCO(2) slope, heart rate (HR, bpm), systolic blood pressure (SBP, mmHg), diastolic (DBP, mmHg) blood pressure and distance. RESULTS: The intraclass correlation coefficients at the sixth minute were: HR (r(i)=0.96, p<0.0001), VE (r(i)=0.84, p<0.0001), SBP (r(i)=0.72, p=0.001), distance (r(i)=0.88, p<0.0001), VO(2) (r(i)=0.92, p<0.0001), SlopeVE/VCO(2) (r(i)=0.86, p<0.0001) and RQ<1 (r(i)=0.6, p=0.004). CONCLUSION: Using the 6CWT with the Borg scale was reproducible, and it seems to be an appropriate method to evaluate the functional capacity of heart failure patients while making sure that they undergo a submaximal walking test. Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo 2008-04 /pmc/articles/PMC2664221/ /pubmed/18438574 Text en Copyright © 2008 Hospital das Clínicas da FMUSP
spellingShingle Clinical Sciences
Guimarães, Guilherme Veiga
Carvalho, Vitor Oliveira
Bocchi, Edimar Alcides
Reproducibility of the Self-Controlled Six-Minute Walking Test in Heart Failure Patients
title Reproducibility of the Self-Controlled Six-Minute Walking Test in Heart Failure Patients
title_full Reproducibility of the Self-Controlled Six-Minute Walking Test in Heart Failure Patients
title_fullStr Reproducibility of the Self-Controlled Six-Minute Walking Test in Heart Failure Patients
title_full_unstemmed Reproducibility of the Self-Controlled Six-Minute Walking Test in Heart Failure Patients
title_short Reproducibility of the Self-Controlled Six-Minute Walking Test in Heart Failure Patients
title_sort reproducibility of the self-controlled six-minute walking test in heart failure patients
topic Clinical Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2664221/
https://www.ncbi.nlm.nih.gov/pubmed/18438574
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