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Clinical Trial Summary

The purpose of this study is to determine whether inspiratory muscle training is effective to improve breathless and exercise intolerance in symptomatic patients with chronic obstructive pulmonary disease (COPD) plus chronic heart failure (HF).


Clinical Trial Description

Chronic obstructive pulmonary disease (COPD) and heart failure with reduced left ventricular ejection fraction (HF) are leading causes of disability and death worldwide. Unfortunately, COPD and HF coexist in up to a third of elderly patients making the so-called COPD-HF overlap (CHO) a major challenge to Health Care Systems. In addition, population ageing anticipates that CHO prevalence will further increase in the next decades.

Intolerance to exertion due to disabling breathlessness is the hallmark of COPD and HF and these abnormalities are notoriously potentiated by diseases coexistence.

The inspiratory muscles are centrally related to the pathophysiology of exertional dyspnea in COPD and HF. In both populations a higher central motor command output is required to maintain adequate force generation in the face of weaker inspiratory muscles. This information is interpreted as "shortness of breath".

There is well established evidence gained from recent meta-analyses indicating that inspiratory muscle training (IMT), as a standalone therapy, significantly improves inspiratory muscle function (strength and endurance), dyspnea during daily activities, and functional exercise capacity in COPD and HF. Previous findings indicate that reduced pressure-generating capacity reflecting inspiratory muscle weakness is frequently observed in patients with COPD-HF and related to a clinically-relevant outcome: exertional dyspnea. These findings set the scene for a randomized controlled trial to investigate the potential role of IMT in dyspnea palliation in CHO patients.

Objectives

To determine the effects of IMT on:

1. Dyspnea on daily life

2. Inspiratory muscle strength and endurance

3. Dyspnea on exertion and time to exercise intolerance ;


Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Outcomes Assessor), Primary Purpose: Treatment


Related Conditions & MeSH terms


NCT number NCT02579200
Study type Interventional
Source Queen's University
Contact J Alberto Neder, MD, PhD
Phone (+1) 613-549-6666
Email nederalb@gmail.com
Status Recruiting
Phase Phase 4
Start date November 2015
Completion date July 2017

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