<unk>  (or pulmonic)<unk>  (or incompetence, or regurgitation) is a condition in which the<unk>  valve is incompetent and allows backflow from the<unk>  artery to the right ventricle of the heart during diastole. While a small amount of backflow may occur ordinarily, it is usually only shown on an echocardiogram and is harmless. More pronounced regurgitation that is noticed through a routine physical examination is a medical sign of disease and warrants further investigation. If it is secondary to<unk>  hypertension it is referred to as a Graham Steell murmur.
Pulmonary insufficiency
Obstructive lung disease
Chronic cough
Cardiomegaly
Pulmonary toxicity
Tracheobronchomegaly
Airway obstruction
Exercise intolerance