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Effect of indacaterol on lung deflation improves cardiac performance in hyperinflated COPD patients: an interventional, randomized, double-blind clinical trial

Authors Santus P, Radovanovic D, Di Marco S, Valenti V, Raccanelli R, Blasi F, Centanni S, Bussotti M

Received 3 July 2015

Accepted for publication 6 August 2015

Published 11 September 2015 Volume 2015:10(1) Pages 1917—1923

DOI https://doi.org/10.2147/COPD.S91684

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Professor Hsiao-Chi Chuang

Peer reviewer comments 3

Editor who approved publication: Dr Richard Russell

Pierachille Santus,1,2 Dejan Radovanovic,1,2 Silvia Di Marco,3 Vincenzo Valenti,4,5 Rita Raccanelli,1,2 Francesco Blasi,6,7 Stefano Centanni,8,9 Maurizio Bussotti3

1Department of Health Sciences, University of Milan, 2Pulmonary Rehabilitation Unit, Fondazione Salvatore Maugeri Scientific Institute of Milan-IRCCS, 3Cardiological Rehabilitation Unit, Fondazione Salvatore Maugeri Rehabilitation Institute of Milan-IRCCS, 4Department of Biomedical Sciences for Health, University of Milan, 5Respiratory Unit, Policlinico San Donato-IRCCS, San Donato Milanese, 6Department of Pathophysiology and Transplantation, University of Milan, 7IRCCS Fondazione Ospedale Maggiore Policlinico Cà Granda Milan, 8Department of Health Sciences, University of Milan, 9Respiratory Unit, Ospedale San Paolo, Milan, Italy

Background: COPD is often associated with cardiovascular comorbidity. Treatment guidelines recommend therapy with bronchodilators as first choice. We investigated the acute effect of single-dose indacaterol on lung hyperinflation in COPD subjects, for the first time evaluating the potential effects on right heart performance.
Methods: In this Phase IV, randomized, interventional, double-blind, crossover clinical study, we recruited 40 patients (50–85 years of age) with stable COPD. Patients were treated with 150 µg indacaterol or placebo and after 60 minutes (T60) and 180 minutes (T180) the following tests were performed: trans-thoracic echocardiography (TTE), plethysmography, diffusing capacity of the lung for carbon monoxide, saturation of peripheral oxygen, and visual analog scale dyspnea score. Patients underwent a crossover re-challenge after a further 72 hours of pharmacological washout. All TTE measurements were conducted blindly by the same operator and further interpreted by two different blinded operators. Consensus decisions were taken on every value and parameter. The primary outcome was the effect of the reduction of residual volume and functional residual capacity on right heart systolic and diastolic function indexes evaluated by TTE in patients treated with indacaterol, as compared to placebo.
Results: Vital capacity, inspiratory capacity, and forced expiratory volume in 1 second were significantly increased by indacaterol, when compared with placebo, while residual volume, intrathoracic gas volume, and specific airway resistance were significantly reduced in patients treated with indacaterol. Tricuspid annular plane systolic excursion was significantly increased versus placebo, paralleled by an increase of tricuspid E-wave deceleration time. The cardiac frequency was also significantly reduced in indacaterol-treated patients.
Conclusion: Indacaterol significantly reduces lung hyperinflation in acute conditions, with a clinically relevant improvement of dyspnea. These modifications are associated with a significant increase of the right ventricular compliance indexes and may have a role in improving left ventricular preload leading to a reduction in cardiac frequency.

Keywords: lung deflation, bronchodilator, cardiac performance, right ventricular function, echocardiography

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