Pulmonary hypeension in COPD is due to all, Except:
Hypoxia
Pulmonary vasoconstriction
High lung volume
Bronchoconstriction
Answer is D (Bronchoconstriction) Bronchoconstriction is not a cause for Pulmonary Hypeension Pulmonary Hypeension in COPD has been attributed to multiple factors including: Hypoxia Pulmonary vasoconstriction (secondary to hyoxia) Acidemia Hypercapnia Mechanical effect of high lung volume on pulmonary vessels Loss of small vessels in vascular bed Regions of emphysematous lung destruction