Characteristics of Chronic Obstructive Pulmonary Disease Patients with Pulmonary Hypertension Assessed by Echocardiography in a Three-Year Observational Cohort Study

Overview

Journal Int J Chron Obstruct Pulmon Dis

Publisher Dove Medical Press

Specialty Pulmonary Medicine

Date 2020 Mar 19

PMID 32184586

Citations 7

Authors

Shingo Nakayama

Shotaro Chubachi

Kaori Sakurai

Hidehiro Irie

Akihiro Tsutsumi

Mizuha Hashiguchi

Yuji Itabashi

Mitsushige Murata

Hidetoshi Nakamura

Koichiro Asano

Koichi Fukunaga

Affiliations

Soon will be listed here.

Abstract

Background: Pulmonary hypertension (PH) is a major comorbidity of chronic obstructive pulmonary disease (COPD). However, the association of PH detected by echocardiography and COPD-related outcome in longitudinal follow-up has not been elucidated. In this study, we aimed to investigate the relationship between clinical characteristics of COPD patients with PH detected by echocardiography and various outcome parameters such as COPD exacerbation and health status over a three-year observation period.

Methods: In this observational study, we analyzed patients with COPD who underwent chest computed tomography and echocardiography at baseline (n = 183).

Results: The prevalence of PH was 21.9% (40 patients). The median estimated systolic pulmonary artery pressure in patients with PH was 38.8 mmHg. COPD patients with PH were older, had a lower body mass index, scored worse in the COPD Assessment Test and St. George's Respiratory Questionnaire, and exhibited a lower diffusing capacity of the lung for carbon monoxide in comparison to patients without PH. In computed tomography images, the percentages of low-attenuation areas (LAA%) and interstitial abnormalities were higher in COPD patients with PH than in those without PH. Higher values for LAA% (LAA ≥ 30%) and interstitial abnormalities independently increased the risk of PH. The ratio of main pulmonary diameter to aortic artery diameter was significantly correlated with estimated systolic pulmonary artery pressure. In the follow-up analysis, the frequency of exacerbations in three years was significantly higher in patients with PH compared to patients without PH.

Conclusion: In this study, we identified the clinical characteristics of COPD patients with PH detected by echocardiography. The presence of PH assessed by echocardiography was related to future COPD exacerbations and closely related to radiographical emphysema.

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