Document Detail


Changes in exercise capacity, ventilation, and body weight following heart transplantation.
MedLine Citation:
PMID:  17023206     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
AIMS: Peak oxygen uptake adjusted to body weight (peak VO(2)) and ventilatory efficiency (VE/VCO(2)-slope) are important prognostic parameters in chronic heart failure. Our study prospectively examined changes in these parameters over 24 months following heart transplantation (HTx) and evaluated the potentially confounding effects of weight gain.
METHODS AND RESULTS: One hundred patients with chronic heart failure (16 female, mean age at HTx 53.9+/-9.6 years) underwent cardiopulmonary exercise testing before and 3, 6, 12 and/or 24 months after HTx. Twenty-five healthy individuals served as matched normals. VE/VCO(2)-slope during exercise improved significantly at 6 (-23.7%), 12 (-21.3%), and 24 months (-32.3%; all p<0.002 vs. baseline). At 6 months, VE/VCO(2)-slopes were similar to the matched normals (31.8+/-4.3), 46 of 78 patients achieved values within the 95% confidence interval of normal. Peak VO(2) increased significantly after HTx at 6 (+31.8%), 12 (+36.2%), and 24 months (+42.2%; all p<0.005). None of the patients reached values within the 95% CI of normal. Although VE/VCO(2)-slope and peak VO(2) were correlated inversely at every time point (p<0.03), reduction in VE/VCO(2)-slope did not correlate with increase in peak VO(2). Symptoms that limited exercise changed from dyspnoea before HTx to leg fatigue after HTx.
CONCLUSION: Following HTX, VE/VCO(2)-slope returns to normal values in the majority of patients; however, despite improvement, peak VO(2) remains abnormal in all patients. Symptoms causing patients to stop exercising change from dyspnoea to leg fatigue.
Authors:
Dirk Habedank; Ralf Ewert; Manfred Hummel; Roland Wensel; Roland Hetzer; Stefan D Anker
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Publication Detail:
Type:  Journal Article     Date:  2006-10-04
Journal Detail:
Title:  European journal of heart failure     Volume:  9     ISSN:  1388-9842     ISO Abbreviation:  Eur. J. Heart Fail.     Publication Date:  2007 Mar 
Date Detail:
Created Date:  2007-03-05     Completed Date:  2007-06-19     Revised Date:  2011-06-08    
Medline Journal Info:
Nlm Unique ID:  100887595     Medline TA:  Eur J Heart Fail     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  310-6     Citation Subset:  IM    
Affiliation:
Division of Applied Cachexia Research, Department of Cardiology, Charité Campus Virchow-Klinikum, Berlin, Germany. dirk.habedank@charite.de <dirk.habedank@charite.de>
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MeSH Terms
Descriptor/Qualifier:
Adult
Analysis of Variance
Blood Gas Analysis
Body Weight / physiology*
Confidence Intervals
Exercise Tolerance / physiology*
Female
Follow-Up Studies
Heart Failure / physiopathology*,  prevention & control
Heart Transplantation / physiology*
Humans
Male
Middle Aged
Oxygen Consumption / physiology
Prospective Studies
Pulmonary Ventilation / physiology*
Spirometry / methods

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


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