What Causes Pulmonary Hypertension?
Pulmonary hypertension (PH) is a rare but life-threatening lung disease that occurs when the pulmonary arteries become narrowed and stiff. The pulmonary arteries are the vessels that move blood from the heart to the lungs, and when they are obstructed, the heart needs to work harder to pump the blood. The disease can cause an enlargement and weakening of the heart, and ultimately right heart failure or other fatal consequences.
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