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Evolution of dyspnea during exercise in chronic obstructive pulmonary disease: impact of critical volume constraints.

Authors
  • Laveneziana, Pierantonio
  • Webb, Katherine A
  • Ora, Josuel
  • Wadell, Karin
  • O'Donnell, Denis E
Type
Published Article
Journal
American Journal of Respiratory and Critical Care Medicine
Publisher
American Thoracic Society
Publication Date
Dec 15, 2011
Volume
184
Issue
12
Pages
1367–1373
Identifiers
DOI: 10.1164/rccm.201106-1128OC
PMID: 21885624
Source
Medline
License
Unknown

Abstract

Regardless of the exercise test protocol, the inflection (or plateau) in the Vt response marked the point where dyspnea intensity rose abruptly and there was a transition in the dominant qualitative descriptor choice from "work and effort" to "unsatisfied inspiration." Intensity and quality of dyspnea evolve separately and are strongly influenced by mechanical constraints on Vt expansion during exercise in COPD.

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