Impact of Non-invasive Ventilation in Hypercapnic COPD

Status Terminated

Clinical Trial Summary

Chronic obstructive pulmonary disease (COPD) is a highly prevalent condition worldwide and is a cause of substantial morbidity and mortality. Unfortunately, few therapies have been shown to improve survival. The importance of systemic effects and co-morbidities in COPD has garnered attention based on the observation that many patients with COPD die from causes other than respiratory failure, including a large proportion from cardiovascular causes. Recently, two high profile randomized trials have shown substantial improvements in morbidity and mortality with use of nocturnal non-invasive ventilation (NIV) in COPD patients with hypercapnia. Although the mechanisms by which NIV improves outcomes remain unclear, the important benefits of NIV might be cardiovascular via a number of mechanisms. In contrast to prior trials of NIV in COPD that did not show substantial benefit, a distinguishing feature of these encouraging recent NIV clinical trials was a prominent reduction of hypercapnia, which might be a maker or mediator of effective therapy. Alternatively, improvements might be best achieved by targeting a different physiological measure. Additional mechanistic data are therefore needed to inform future trials and achieve maximal benefit of NIV. Recent work in cardiovascular biomarkers has identified high-sensitivity troponin to have substantial ability to determine cardiovascular stress in a variety of conditions - even with only small changes. In COPD, a number of observational studies have shown that high-sensitivity troponin increases with worsening disease severity, and that levels increase overnight during sleep. This biomarker therefore presents a promising means to study causal pathways regarding the effect of NIV in patients with COPD. With this background, the investigator's overall goals are: 1) To determine whether the beneficial effect of non-invasive ventilation might be due to a reduction in cardiovascular stress, using established cardiovascular biomarkers, and 2) To define whether a reduction in PaCO2 (or alternative mechanism) is associated with such an effect.

Clinical Trial Description

n/a

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT03522805
Study type	Interventional
Source	University of California, San Diego
Contact
Status	Terminated
Phase	N/A
Start date	April 23, 2018
Completion date	November 21, 2018

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