Pulmonary artery hypertension (PAH) results from which alteration?
A)Narrowed pulmonary capillaries
B)Narrowed bronchi and bronchioles
C)Destruction of alveoli
D)Ischemia of the myocardium

Question

Quizplus · Accepted Answer

PAH is characterized by endothelial dysfunction with an overproduction of vasoconstrictors (e.g., thromboxane, endothelin) and decreased production of vasodilators (e.g., nitric oxide, prostacyclin), resulting in narrowed pulmonary capillaries. This process does not occur in bronchi and bronchioles and does not include destruction of the alveoli or ischemia of the myocardium.

Pulmonary Artery Hypertension (PAH) Results from Which Alteration