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Pulmonary artery pressure in chronic obstructive pulmonary disease without resting hypoxaemia

Authors
Lee, J. H.Oh, Y-M.Seo, J. B.Lee, Y. K.Kim, W. J.Sheen, S. S.Kim, T-H.Lee, J-H.Kim, E-K.Lee, J. S.Huh, J. W.Lim, S. Y.Yoon, H. I.Shin, T. R.Lee, S-M.Lee, S. Y.Lee, S-D.
Issue Date
6월-2011
Publisher
INT UNION AGAINST TUBERCULOSIS LUNG DISEASE (I U A T L D)
Keywords
COPD; echocardiography; haemoglobin; pulmonary artery pressure
Citation
INTERNATIONAL JOURNAL OF TUBERCULOSIS AND LUNG DISEASE, v.15, no.6, pp.830 - 837
Indexed
SCIE
SCOPUS
Journal Title
INTERNATIONAL JOURNAL OF TUBERCULOSIS AND LUNG DISEASE
Volume
15
Number
6
Start Page
830
End Page
837
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/112357
DOI
10.5588/ijtld.10.0598
ISSN
1027-3719
Abstract
BACKGROUND: Chronic obstructive pulmonary disease (COPD) can lead to pulmonary hypertension and cor pulmonale, which are predictors of mortality. OBJECTIVE: To identify predictors of increased pulmonary artery pressure (PAP) in COPD patients without resting hypoxaemia, and to characterise COPD patients with increased PAP. DESIGN: A study of 117 COPD patients from the Korean Obstructive Lung Disease (KOLD) cohort who had measurable tricuspid regurgitant flow under transthoracic Doppler echocardiography and no resting hypoxaemia. RESULTS: The mean patient age was 67 years. Mean forced expiratory volume in 1 second (FEV1) was 47% predicted, mean haemoglobin (Hb) concentration was 145 g/l and mean systolic PAP (sPAP) was 33 mmHg. Multiple linear regression analysis showed that Hb was the only factor independently associated with sPAP (beta = -1.752,P = 0.005). Cluster analysis using FEV1% predicted, sPAP and Hb concentration as variables indicated three patient clusters: Cluster 1 (n = 36; mean FEV1 44% predicted, mean sPAP 39 mmHg, mean Hb 132 g/l), Cluster 2 (n = 45; FEV1 35% predicted, sPAP 31 mmHg, Hb 154 g/l), and Cluster 3 (n = 36; FEAT, 65% predicted, sPAP 29 mmHg, Hb 148 g/l). CONCLUSION: Elevated PAP was linked to low haemoglobin levels in COPD without resting hypoxaemia.
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