What are the different types of PAH?
PAH is divided into multiple subgroups, including: • Idiopathic PAH (IPAH)—no specific cause can be identified • Heritable PAH—PAH that runs in families and can be inherited through certain genes • Drug- and toxin-induced PAH—PAH that occurs in people who have taken certain prescription, over-the-counter, or street drugs • Associated PAH—PAH that develops in individuals with other diseases or conditions linked to PAH, for example, connective tissue disease, liver disease, HIV infection, or certain birth defects involving the heart
