Treatment of Pulmonary Arterial Hypertension Using the Aria CV Pulmonary Hypertension System

This study tests a new implantable device called the Aria CV system, designed to reduce pressure in the lungs for patients with pulmonary arterial hypertension (PAH) — a condition where the blood pressure in the arteries leading to the lungs is dangerously high. **You may be eligible if...** - You are 18 or older with high pressure in your lung arteries (mean pulmonary artery pressure above 25 mmHg) - Your right side of the heart is not functioning well, as shown by specific tests - Your symptoms are severe (WHO functional class III or IV) - You are already on stable medication for pulmonary hypertension - Your lung artery anatomy is suitable for the device **You may NOT be eligible if...** - Your lung or heart anatomy is not appropriate for the device - You are not approved by the study's eligibility review committee - You are unwilling to follow device-related travel restrictions Talk to your doctor to see if this trial is right for you.