| http://www.w3.org/ns/prov#value | - Pulmonary hypertension can be caused by diseases of the heart and the lungs, such as chronic obstructive pulmonary disease (COPD) or emphysema, sleep apnea (a sleeping disorder characterized by pauses in breathing), failure of the left heart ventricle, recurrent pulmonary embolism (blood clots traveling from the legs or pelvic veins obstructing the pulmonary arteries), or underlying diseases such
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