Document Detail


Comparison of the 6-minute walk test with established parameters for assessment of cardiopulmonary capacity in adults with complex congenital cardiac disease.
MedLine Citation:
PMID:  16014186     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Objective assessment of the cardiopulmonary capacity in patients with complex congenital cardiac disease often remains difficult in clinical practice. The cardiopulmonary exercise test and determination of the levels of brain natriuretic peptide in the plasma are established tests, but expensive. The 6-minute walk test is also validated, but has not often been used in patients with heart failure due to congenital heart disease, nor compared with other tests. We sought to compare its value with the results of cardiopulmonary exercise testing and measuring the levels of brain natriuretic peptide in the plasma. METHODS: We carried out a standardized 6-minute walk test in 31 patients with complex congenital cardiac disease on the same day that they underwent cardiopulmonary exercise testing and determination of levels of brain natriuretic peptide in the plasma. Of the patients, 7 had functionally univentricular hearts, 9 had transposition, 9 had tetralogy of Fallot, 3 had common arterial trunk, and 3 had pulmonary atresia with intact interventricular septum. Uptakes of oxygen at peak exercise, and at the anaerobic threshold, were determined using cardiopulmonary exercise testing, and classified as suggested by Weber. The 6-minute walk test was performed according to a standard protocol. RESULTS: There was a significant correlation between brain natriuretic peptide, oxygen uptakes at peak exercise and 6-minute walk. The correlation between the 6-minute walk test and oxygen uptakes at the anaerobic threshold, however, was not significant. CONCLUSIONS: The 6-minute walk test can be performed easily, is inexpensive, widely available, and correlates well with measurements of brain natriuretic peptide and cardiopulmonary exercise testing, even in patients with corrected or palliated congenital cardiac malformations. A cut-off value of 450 metres in the 6-minute walk test allows a semi-quantitative classification in analogy to the classification suggested by Weber for cardiopulmonary exercise testing, and to a level of brain natriuretic peptide in the plasma of less or more than 100 picograms per millilitre.
Authors:
Andreas Niedeggen; Erik Skobel; Philipp Haager; Wolfgang Lepper; Eberhard Mühler; Andreas Franke
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Cardiology in the young     Volume:  15     ISSN:  1047-9511     ISO Abbreviation:  Cardiol Young     Publication Date:  2005 Aug 
Date Detail:
Created Date:  2005-07-14     Completed Date:  2005-11-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9200019     Medline TA:  Cardiol Young     Country:  England    
Other Details:
Languages:  eng     Pagination:  385-90     Citation Subset:  IM    
Affiliation:
Department of Cardiology, University Hospital, Aachen, Germany. andreas.niedeggen@dgn.de
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MeSH Terms
Descriptor/Qualifier:
Adult
Anaerobic Threshold / physiology*
Exercise Test*
Female
Heart Defects, Congenital / blood,  physiopathology*
Humans
Male
Natriuretic Peptide, Brain / blood
Prospective Studies
Pulmonary Gas Exchange / physiology
Time Factors
Walking / physiology*
Chemical
Reg. No./Substance:
114471-18-0/Natriuretic Peptide, Brain

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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