Study Overview: This study is about a special treatment called treprostinil to help people with a condition called Pulmonary Arterial Hypertension (PAH). PAH is when the blood pressure in the lungs is too high, which can hurt the heart. The study aims to see if treprostinil can lower lung blood pressure and improve heart function.

Eligibility: You may join if you have PAH caused by certain conditions, like connective tissue disease or HIV, and meet specific health criteria. You should not have used certain medications or have certain health issues, like severe liver problems or certain heart conditions.

Key Points:

• The study involves taking treprostinil along with other PAH medications.
• Participants need to be available for regular check-ups and tests.
• Exclusion applies if you used specific PAH medications or have certain health devices.

By joining this study, you may help others in the future by contributing valuable information about PAH treatments. Always discuss with your doctor if joining a study is right for you.