A Study on the Efficacy and Safety of Empagliflozin in the Treatment of Pulmonary Arterial Hypertension

The goal of this clinical trial is to learn if empagliflozin works to treat patients with pulmonary arterial hypertension. It will also learn about the safety of empagliflozin. The main questions it aims to answer are: Based on standard treatment, does empagliflozin reduce pulmonary artery pressure and improve cardiac function in patients with pulmonary arterial hypertension? What medical problems do participants have when taking empagliflozin? Researchers will compare empagliflozin to a placebo (a look-alike substance that contains no drug) to see if empagliflozin works to treat patients with pulmonary arterial hypertension. Participants will: Take empagliflozin or a placebo every day for 12 weeks Visit the clinic once every 4 weeks for checkups and tests Keep a diary of their symptoms and the drug taking situation