Document Detail

Influence of heart failure etiology on the prognostic value of peak oxygen consumption and minute ventilation/carbon dioxide production slope.
MedLine Citation:
PMID:  16236959     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Peak oxygen consumption (V(O2)) and minute ventilation (V(E))/carbon dioxide production (V(CO2)) slope have been widely demonstrated to have strong prognostic value in patients with heart failure (HF). In the present study, we investigated the effect of HF etiology on the prognostic applications of peak V(O2) and Ve/V(CO2) slope. METHODS: Two hundred sixty-eight subjects underwent symptom-limited cardiopulmonary exercise testing (CPX). The population was divided into ischemic (115 men and 22 women) and nonischemic (108 men and 23 women) subgroups. The occurrence of cardiac-related events over the year following CPX was compared between groups using receiver operating characteristic curve (ROC) analysis RESULTS: Mean age +/- SD was significantly higher (61.0 +/- 10.0 years vs 50.3 +/- 16.2 years) while mean peak V(O2) was significantly lower (15.0 +/- 5.2 mL/kg/min vs 17.5 +/- 6.7 mL/kg/min) in the ischemic HF group (p < 0.05). ROC curve analysis demonstrated that both peak V(O2) and V(E)/V(CO2) slope were significant predictors of cardiac events in both the ischemic group (peak V(O2), 0.74; V(E)/V(CO2) slope, 0.76; p < 0.001) and the nonischemic group (peak V(O2), 0.75; V(E)/V(CO2) slope, 0.86; p < 0.001). Optimal prognostic threshold values for peak V(O2) were 14.1 mL/kg/min and 14.6 mL/kg/min in the ischemic and nonischemic groups, respectively. Optimal prognostic threshold values for the V(E)/V(CO2) slope were 34.2 and 34.5 in the ischemic and nonischemic groups, respectively. CONCLUSIONS: Baseline and exercise characteristics were different between ischemic and nonischemic patients with HF. However, the prognostic power of the major CPX variables was strikingly similar. Different prognostic classification schemes based on HF etiology may therefore not be necessary when analyzing CPX responses in clinical practice.
Ross Arena; Jonathan Myers; Joshua Abella; Mary Ann Peberdy
Related Documents :
6797219 - Control of carbon dioxide in modified mapleson a and d (hafnia) anaesthetic systems. an...
16640679 - In vivo effect of carbon dioxide laser-skin resurfacing and mechanical abrasion on the ...
1757359 - Lesions in retrotrapezoid nucleus decrease ventilatory output in anesthetized or decere...
5965899 - The respiratory response of the new-born lamb to inhaled co-2 with and without accompan...
240799 - Effect of carotid body resection on ventilatory and acid-base control during exercise.
10701709 - Co2 transport and excretion in rainbow trout (oncorhynchus mykiss) during graded sustai...
22418889 - Exercise and the liver: implications for therapy in fatty liver disorders.
2787309 - Efficacy of shoulder range of motion exercise in hospitalized patients after coronary a...
18067519 - Social physique anxiety and sociocultural attitudes toward appearance impact on orthore...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Chest     Volume:  128     ISSN:  0012-3692     ISO Abbreviation:  Chest     Publication Date:  2005 Oct 
Date Detail:
Created Date:  2005-10-20     Completed Date:  2005-11-21     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0231335     Medline TA:  Chest     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2812-7     Citation Subset:  AIM; IM    
Department of Physical Therapy, Box 980224, Virginia Commonwealth University, Medical College of Virginia, Health Sciences Campus, Richmond, VA 23298-0224, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Carbon Dioxide / blood*
Heart Failure / etiology*
Middle Aged
Myocardial Ischemia / physiopathology*
Oxygen Consumption*
ROC Curve
Reference Values
Respiratory Physiological Phenomena
Ventricular Function, Left
Reg. No./Substance:
124-38-9/Carbon Dioxide

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

Previous Document:  Impact of the exercise mode on exercise capacity: bicycle testing revisited.
Next Document:  Prevalence of physician-diagnosed COPD and its association with smoking among urban and rural reside...