Pulmonary arterial hypertension is a disease in which blood is not able to circulate normally through the lungs due to narrowing of the pulmonary arteries. Over time, blood cells stiffen and thicken, leading to increases in pressures and swelling of the heart.
The average (mean) pressure within the pulmonary arteries (also known as mPAP) is normally at 15-25 mmHg. For someone living with PAH, mPAP is equal to or higher than 25 mmHg.
What causes PAH?
The exact cause of PAH is not well understood, although new progress in research is always happening. The condition can be: