What Is Pulmonary Arterial Hypertension?

Pulmonary arterial hypertension (PAH) is a type of pulmonary hypertension. It means that you have high blood pressure in the arteries that go from your heart to your lungs. But it’s different from having regular high blood pressure. 

With PAH, the tiny arteries in your lungs become narrow or blocked. It’s harder for blood to flow through them, and that raises the blood pressure in your lungs. Your heart has to work harder to pump blood through those arteries. 

PAH is a progressive condition that gets worse as time goes on. After a while, the heart muscle gets weak. Eventually, it can lead to heart failure.