Clinical Research Directory

Inclusion Criteria: * Age 40 to 75 years. * Stable with less than 10mg prednisone (or equivalent) daily. * Nonsmoking for 4 months prior to screening and willing to not smoke during the study duration. * Current pneumococcus vaccination. * Current influenza vaccination. * Target lung volume reduction \<350ml after bronchoscopic lung volume reduction (BLVR). * Persistent dyspnea defined as an mMRC score greater or equal to 2 after bronchoscopic lung volume reduction (BLVR). * Endobronchial valves (EBV) are still in place. * Willing and able to complete protocol required study follow-up assessments and procedures. Exclusion Criteria: * Clinically significant (greater than 4 tablespoons per day) mucus production. * Myocardial infarction within 6 months of screening. * Decompensated heart failure. * Three or more pneumonia episodes in last year. * Three or more COPD exacerbation episodes in the last year. * Prior lung transplant, LVRS, bullectomy, or lobectomy. * Clinically significant bronchiectasis. * Unable to safely discontinue anticoagulants or platelet activity inhibitors for 7 days. * Uncontrolled pulmonary hypertension (systolic pulmonary arterial pressure \>45mmHg) or evidence or history of CorPulmonale as determined by a recent echocardiogram (completed within the last 3 months prior to screening visit). * Left ventricular ejection fraction (LVEF) less than 40% as determined by a recent echocardiogram (completed within the last 3 months prior to screening visit). * Resting bradycardia (\<50 bpm), Complex ventricular arrhythmia, sustained SVT. * PaCO2 greater than 50mmHg on room air at screening. * PaO2 less than 45mmHg on room air at screening.