Use of the Wasserman equation in optimization of the duration of the power ramp in a cardiopulmonary exercise test: a study of Brazilian men
This study aimed to analyze the agreement between measurements of unloaded oxygen uptake and peak oxygen uptake based on equations proposed by Wasserman and on real measurements directly obtained with the ergospirometry system. We performed an incremental cardiopulmonary exercise test (CPET), which...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Divulgação Científica
2015-09-01
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| Series: | Brazilian Journal of Medical and Biological Research |
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| Online Access: | http://www.scielo.br/pdf/bjmbr/v48n12/1414-431X-bjmbr-1414-431X20154692.pdf |
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| author | D. C. Costa G. L. de Santi J. C. Crescêncio L. P. Seabra E. E. V. Carvalho V. Papa F. Marques L. Gallo Junior A. Schmidt |
| author_facet | D. C. Costa G. L. de Santi J. C. Crescêncio L. P. Seabra E. E. V. Carvalho V. Papa F. Marques L. Gallo Junior A. Schmidt |
| author_sort | D. C. Costa |
| collection | DOAJ |
| description | This study aimed to analyze the agreement between measurements of unloaded oxygen uptake and peak oxygen uptake based on equations proposed by Wasserman and on real measurements directly obtained with the ergospirometry system. We performed an incremental cardiopulmonary exercise test (CPET), which was applied to two groups of sedentary male subjects: one apparently healthy group (HG, n=12) and the other had stable coronary artery disease (n=16). The mean age in the HG was 47±4 years and that in the coronary artery disease group (CG) was 57±8 years. Both groups performed CPET on a cycle ergometer with a ramp-type protocol at an intensity that was calculated according to the Wasserman equation. In the HG, there was no significant difference between measurements predicted by the formula and real measurements obtained in CPET in the unloaded condition. However, at peak effort, a significant difference was observed between oxygen uptake ( V ˙O2)peak(predicted) and V ˙O2peak(real) (nonparametric Wilcoxon test). In the CG, there was a significant difference of 116.26 mL/min between the predicted values by the formula and the real values obtained in the unloaded condition. A significant difference in peak effort was found, where V ˙O2peak(real) was 40% lower than V ˙O2peak(predicted) (nonparametric Wilcoxon test). There was no agreement between the real and predicted measurements as analyzed by Lin’s coefficient or the Bland and Altman model. The Wasserman formula does not appear to be appropriate for prediction of functional capacity of volunteers. Therefore, this formula cannot precisely predict the increase in power in incremental CPET on a cycle ergometer. |
| first_indexed | 2024-04-11T15:09:31Z |
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| id | doaj.art-8d3335c1064148e1961fce8c85320b4f |
| institution | Directory Open Access Journal |
| issn | 1414-431X |
| language | English |
| last_indexed | 2024-04-11T15:09:31Z |
| publishDate | 2015-09-01 |
| publisher | Associação Brasileira de Divulgação Científica |
| record_format | Article |
| series | Brazilian Journal of Medical and Biological Research |
| spelling | doaj.art-8d3335c1064148e1961fce8c85320b4f2022-12-22T04:16:42ZengAssociação Brasileira de Divulgação CientíficaBrazilian Journal of Medical and Biological Research1414-431X2015-09-0148121136114410.1590/1414-431x20154692Use of the Wasserman equation in optimization of the duration of the power ramp in a cardiopulmonary exercise test: a study of Brazilian menD. C. CostaG. L. de SantiJ. C. CrescêncioL. P. SeabraE. E. V. CarvalhoV. PapaF. MarquesL. Gallo JuniorA. SchmidtThis study aimed to analyze the agreement between measurements of unloaded oxygen uptake and peak oxygen uptake based on equations proposed by Wasserman and on real measurements directly obtained with the ergospirometry system. We performed an incremental cardiopulmonary exercise test (CPET), which was applied to two groups of sedentary male subjects: one apparently healthy group (HG, n=12) and the other had stable coronary artery disease (n=16). The mean age in the HG was 47±4 years and that in the coronary artery disease group (CG) was 57±8 years. Both groups performed CPET on a cycle ergometer with a ramp-type protocol at an intensity that was calculated according to the Wasserman equation. In the HG, there was no significant difference between measurements predicted by the formula and real measurements obtained in CPET in the unloaded condition. However, at peak effort, a significant difference was observed between oxygen uptake ( V ˙O2)peak(predicted) and V ˙O2peak(real) (nonparametric Wilcoxon test). In the CG, there was a significant difference of 116.26 mL/min between the predicted values by the formula and the real values obtained in the unloaded condition. A significant difference in peak effort was found, where V ˙O2peak(real) was 40% lower than V ˙O2peak(predicted) (nonparametric Wilcoxon test). There was no agreement between the real and predicted measurements as analyzed by Lin’s coefficient or the Bland and Altman model. The Wasserman formula does not appear to be appropriate for prediction of functional capacity of volunteers. Therefore, this formula cannot precisely predict the increase in power in incremental CPET on a cycle ergometer.http://www.scielo.br/pdf/bjmbr/v48n12/1414-431X-bjmbr-1414-431X20154692.pdfWasserman equationCardiopulmonary exercise testCoronary artery diseaseCardiovascular diagnostic techniques |
| spellingShingle | D. C. Costa G. L. de Santi J. C. Crescêncio L. P. Seabra E. E. V. Carvalho V. Papa F. Marques L. Gallo Junior A. Schmidt Use of the Wasserman equation in optimization of the duration of the power ramp in a cardiopulmonary exercise test: a study of Brazilian men Brazilian Journal of Medical and Biological Research Wasserman equation Cardiopulmonary exercise test Coronary artery disease Cardiovascular diagnostic techniques |
| title | Use of the Wasserman equation in optimization of the duration of the power ramp in a cardiopulmonary exercise test: a study of Brazilian men |
| title_full | Use of the Wasserman equation in optimization of the duration of the power ramp in a cardiopulmonary exercise test: a study of Brazilian men |
| title_fullStr | Use of the Wasserman equation in optimization of the duration of the power ramp in a cardiopulmonary exercise test: a study of Brazilian men |
| title_full_unstemmed | Use of the Wasserman equation in optimization of the duration of the power ramp in a cardiopulmonary exercise test: a study of Brazilian men |
| title_short | Use of the Wasserman equation in optimization of the duration of the power ramp in a cardiopulmonary exercise test: a study of Brazilian men |
| title_sort | use of the wasserman equation in optimization of the duration of the power ramp in a cardiopulmonary exercise test a study of brazilian men |
| topic | Wasserman equation Cardiopulmonary exercise test Coronary artery disease Cardiovascular diagnostic techniques |
| url | http://www.scielo.br/pdf/bjmbr/v48n12/1414-431X-bjmbr-1414-431X20154692.pdf |
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