This study plans to learn about heart function among individuals with chronic obstructive pulmonary disease (COPD). In particular, the investigators want to understand the different patterns of right ventricular response during rest and moderate- vs high-intensity exercise. By identifying patterns of right ventricular dysfunction, this study will help identify better treatments for patients with COPD in the future.
COPD (determined by ratio of forced expiratory volume in 1 second to forced vital capacity [FEV1/FVC] <0.7)
Age >= 40 years
Exacerbation of COPD in the 3 months prior to enrollment
Change in COPD therapy in the 3 weeks prior to enrollment
Requirement of >6 LPM supplemental oxygen at rest
Requirement of >10 LPM supplemental oxygen with exertion