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. 2013 Dec 5;8:621–629. doi: 10.2147/COPD.S52854

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© 2013 Høiseth et al. This work is published by Dove Medical Press Limited, and licensed under Creative Commons Attribution – Non Commercial (unported, v3.0) License

The full terms of the License are available at http://creativecommons.org/licenses/by-nc/3.0/. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

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Randomly selected chest radiographs assessed negative in the routine assessment and positive in the standardized assessment.

Notes: (A) FEV₁ =2.3 L, FEV₁/FVC =0.6, NT-proBNP =109 pg/mL. (B) FEV₁ =1.0 L, FV₁/FVC =0.38, NT-proBNP =4,310 pg/mL.

Abbreviations: FEV₁, forced expiratory volume in 1 second; FVC, forced vital capacity; NT-proBNP, N-terminal prohormone of brain natriuretic peptide.