Phenotyping Exertional Breathlessness Using Cardiopulmonary Cycle Exercise Testing in People With Chronic Airflow Limitation
Background: Exertional breathlessness is a cardinal symptom of people with chronic airflow limitation (CAL) and can be evaluated using cardiopulmonary exercise testing (CPET). Research Question: Does abnormally high exertional breathlessness in relationship to the rate of oxygen uptake (V′O2) and minute ventilation (V′E) indicate different underlying pathophysiologic mechanisms and clinical charac
