COPD is an internationally recognized term used to indicate chronic bronchitis and emphysema.
Key feature of COPD is poor reversibility of airflow limitation even after giving bronchodilators.
COPD is more common in young age.
COPD originates in the peripheral airways and in the air spaces of the lungs
Homozygous serum alpha-1 antitrypsin deficiency.
Potassium sparing diuretics
Long history of heavy smoking.
Chronic cough with large amount of sputum production.
Breathlessness mainly on exertion, which is gradually increasing.
All of the above