Comparison between cardiopulmonary exercise testing parameters and computed tomography findings in patients with thoracic sarcoidosis.

Abstract:

BACKGROUND:Cardiopulmonary exercise testing (CPET) is a safe and clinically useful method to assess functional capacity and to follow disease progression and the response to treatment in several clinical conditions. AIM:We set out to determine the relationship between outcome measures of CPET and high-resolution computed tomography (HRCT) findings in thoracic sarcoidosis. METHODS:A cross-sectional study was carried out in which 42 nonsmoking outpatients (22 females; median age = 46.5 years) were evaluated. All the patients underwent pulmonary function tests (PFTs) and CPET. By using CPET, the most probable causes of exercise limitation were separated into respiratory mechanics (n = 25) and cardiovascular (n = 17). By using HRCT, the following patterns were recorded: predominant nodules (n = 18), predominant ground-glass opacity (n = 10), and predominant traction bronchiectasis and honeycombing (n = 14). RESULTS:Although significant differences have been shown for both PFT parameters and CPET results, only the latter were able to distinguish between patients with ground-glass opacity and patients with traction bronchiectasis and honeycombing on HRCT. A statistically significant difference was found for peak VO(2), breathing reserve, and P(A-a)O(2) when patients with predominant traction bronchiectasis and honeycombing were compared to patients with other HRCT patterns (p < 0.0001). There was no statistical difference among the patterns with abnormal CPET and the patterns of abnormalities on HRCT (p > 0.05). CONCLUSION:The functional capacity assessed by CPET was strongly influenced by HRCT patterns in sarcoidosis. Patients with traction bronchiectasis and honeycombing have lower exercise capacity measured by CPET.

journal_name

Lung

journal_title

Lung

authors

Lopes AJ,de Menezes SL,Dias CM,de Oliveira JF,Mainenti MR,Guimarães FS

doi

10.1007/s00408-011-9316-1

subject

Has Abstract

pub_date

2011-10-01 00:00:00

pages

425-31

issue

5

eissn

0341-2040

issn

1432-1750

journal_volume

189

pub_type

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