Effect of indacaterol/glycopyrronium on ventilation and perfusion in COPD: a randomized trial.

Rationale: The long-acting β-agonist/long-acting muscarinic antagonist combination indacaterol/glycopyrronium (IND/GLY) elicits bronchodilation, improves symptoms, and reduces exacerbations in COPD. Magnetic resonance imaging (MRI) of the lung with hyperpolarized gas and gadolinium contrast enhancement enables assessment of whole lung functional responses to IND/GLY.

Objectives: The primary objective was assessment of effect of IND/GLY on global ventilated lung volume (%VV) versus placebo in COPD.