It is not always known what causes PAH or what the best treatment is. The doctors doing this study would like to understand more about why some people develop PAH and other do not. They also would like to learn more about which treatments might help PAH and which people might respond better to treatments. Doctors think that testing certain substances found in blood cells might help answer these questions. These substances are normally released by our bodies to protect us from infection and to tell the difference between normal and foreign substances in our body. Finally, a new test will study very small molecules called microRNA that control how our genes are expressed. This study is being done to see if blood samples can be tested to determine who might develop PAH, how well drugs will work to treat PAH and to learn more about the development of PAH.
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evaluate if miRNa profile and markers of inflammation in patients with PAH. These profiles may enable us differentiate patients that have PAH. This may assist in predicting response to therapy and enable us to optimize their treatment. may also shed s
Timeframe: end of study