Primarily found in people ages 65 to 74, Chronic Obstructive Pulmonary Disease (COPD), also known as emphysema, refers to a group of conditions that lead to airflow blockage and breathing-related problems, chronic bronchitis, refractory asthma, and some forms of bronciectasis. Also falling into the COPD category, chronic lower respiratory disease was the third leading cause of death in the United ...