What therapy has been proven to improve survival in patients with COPD and pulmonary hyper-tension?
a. Bronchodilators
b. Oral vasodilators
c. Oxygen
d. Prostanoids
ANS: C
Oxygen therapy is the main treatment that improves survival among patients with COPD and pulmonary hypertension, though smoking cessation and lung volume reduction (in selected indi-viduals) may also confer survival benefits in patients with COPD.
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