What is PAH in medical terms?

What Is PAH in Medical Terms?

Pulmonary Arterial Hypertension, or PAH, is a specific and progressive type of pulmonary hypertension—a condition characterized by high blood pressure in the arteries of the lungs. While "pulmonary hypertension" is a broader term that includes various causes of elevated lung pressure, PAH refers specifically to the narrowing and stiffening of the small arteries in the lungs, which makes it harder for the heart to pump blood through them.

Over time, this added strain can weaken the right side of the heart, potentially leading to right-sided heart failure if left untreated. PAH can develop on its own (known as idiopathic PAH), be inherited, or be linked to conditions like connective tissue diseases, congenital heart defects, or liver disease.

Symptoms often start subtly—shortness of breath during routine activity, fatigue, chest pain, and dizziness are common early signs. Because these can mimic other heart or lung conditions, PAH is frequently diagnosed late in its progression. Doctors may use echocardiograms, right heart catheterization, and other tests to confirm the diagnosis.

While there is no cure for PAH, treatments have improved significantly over the years. Medications like vasodilators, endothelin receptor antagonists, and PDE-5 inhibitors help relax blood vessels and improve blood flow. In advanced cases, oxygen therapy or even lung transplantation may be considered.

Living with PAH often requires lifestyle adjustments and regular medical care, but early detection and proper management can greatly enhance quality of life. Awareness is key—knowing the signs and seeking timely evaluation can make a real difference for those affected.