Pulmonary hypeension in COPD is due to all, Except:: (A) Hypoxia, (B) Pulmonary vasoconstriction, (C) High lung volume, (D) Bronchoconstriction
Answer is D. 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