Document Detail

Cardiopulmonary exercise function among patients undergoing transcatheter pulmonary valve implantation in the US Melody valve investigational trial.
MedLine Citation:
PMID:  22305848     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: We assessed the hypothesis that there is an improvement in clinical and physiologic parameters of cardiopulmonary exercise testing (CPET) after implantation of a transcatheter pulmonary valve (TPV).
BACKGROUND: Transcatheter pulmonary valve provides a new tool for treating conduit stenosis and regurgitation in patients with right ventricle (RV) to pulmonary artery conduit dysfunction.
METHODS: Patients who underwent a TPV placement between January 2007 and January 2010 (N = 150) were investigated with a standardized CPET protocol before and at 6 months after TPV placement. Cardiopulmonary exercise testing was performed on a mechanically braked cycle ergometer with respiratory gas exchange analysis.
RESULTS: Six months post TPV, small but statistically significant improvements were observed in the maximum workload (65.0% ± 18.8% to 68.3% ± 20.3% predicted, P < .001) and the ratio of minute ventilation to CO(2) production at the anaerobic threshold (30.8 ± 4.7 to 29.1 ± 4.1, P < .001). There was no significant change in peak oxygen consumption (VO(2)). Patients with pre-TPV hemodynamics consistent with RV dysfunction and patients with a lower pre-TPV peak VO(2) tended to have the greatest improvement in peak VO(2). The correlation between TPV-related improvements in peak VO(2) and baseline clinical variables were weak, however, and these variables could not be used to reliably identify patients likely to have improved peak VO(2) after TPV.
CONCLUSION: In patients with RV to pulmonary artery conduit dysfunction, TPV is associated with modest improvement in exercise capacity and gas exchange efficiency during exercise.
Anjan S Batra; Doff B McElhinney; Wayne Wang; Richard Zakheim; Robert P Garofano; Curt Daniels; Delphine Yung; Dan M Cooper; Jonathan Rhodes
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Multicenter Study    
Journal Detail:
Title:  American heart journal     Volume:  163     ISSN:  1097-6744     ISO Abbreviation:  Am. Heart J.     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-02-06     Completed Date:  2012-03-27     Revised Date:  2014-04-08    
Medline Journal Info:
Nlm Unique ID:  0370465     Medline TA:  Am Heart J     Country:  United States    
Other Details:
Languages:  eng     Pagination:  280-7     Citation Subset:  AIM; IM    
Copyright Information:
Copyright © 2012 Mosby, Inc. All rights reserved.
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MeSH Terms
Cardiac Catheterization / methods*
Exercise / physiology*
Exercise Test*
Follow-Up Studies
Heart Valve Prosthesis Implantation / methods*
Hemodynamics / physiology*
Middle Aged
Prospective Studies
Pulmonary Valve Insufficiency / physiopathology,  surgery*
Pulmonary Valve Stenosis / physiopathology,  surgery*
Treatment Outcome
United States
Young Adult

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

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