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Assessments of endothelial function and arterial stiffness are reproducible in patients with COPD.


ABSTRACT:

Background

Elevated cardiovascular disease risk is observed in patients with COPD. Non-invasive assessments of endothelial dysfunction and arterial stiffness have recently emerged to provide mechanistic insight into cardiovascular disease risk in COPD; however, the reproducibility of endothelial function and arterial stiffness has yet to be investigated in this patient population.

Objectives

This study sought to examine the within-day and between-day reproducibility of endothelial function and arterial stiffness in patients with COPD.

Methods

Baseline diameter, peak diameter, flow-mediated dilation, augmentation index, augmentation index at 75 beats per minute, and pulse wave velocity were assessed three times in 17 patients with COPD (six males, eleven females, age range 47-75 years old; forced expiratory volume in 1 second =51.5% predicted). Session A and B were separated by 3 hours (within-day), whereas session C was conducted at least 7 days following session B (between-day). Reproducibility was assessed by: 1) paired t-tests, 2) coefficients of variation, 3) coefficients of variation prime, 4) intra-class correlation coefficient, 5) Pearson's correlations (r), and 6) Bland-Altman plots. Five acceptable assessments were required to confirm reproducibility.

Results

Six out of six within-day criteria were met for endothelial function and arterial stiffness outcomes. Six out of six between-day criteria were met for baseline and peak diameter, augmentation index and pulse wave velocity, whereas five out of six criteria were met for flow-mediated dilation.

Conclusion

The present study provides evidence for within-day and between-day reproducibility of endothelial function and arterial stiffness in patients with COPD.

SUBMITTER: Rodriguez-Miguelez P 

PROVIDER: S-EPMC4577266 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature

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Publications

Assessments of endothelial function and arterial stiffness are reproducible in patients with COPD.

Rodriguez-Miguelez Paula P   Seigler Nichole N   Bass Leon L   Dillard Thomas A TA   Harris Ryan A RA  

International journal of chronic obstructive pulmonary disease 20150916


<h4>Background</h4>Elevated cardiovascular disease risk is observed in patients with COPD. Non-invasive assessments of endothelial dysfunction and arterial stiffness have recently emerged to provide mechanistic insight into cardiovascular disease risk in COPD; however, the reproducibility of endothelial function and arterial stiffness has yet to be investigated in this patient population.<h4>Objectives</h4>This study sought to examine the within-day and between-day reproducibility of endothelial  ...[more]

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