Pulmonary arterial hypertension (PAH) is a rare form of pulmonary hypertension. It occurs because progressive vascular ...

This is called pulmonary circulation. The left-hand side of the heart collects oxygenated blood from the heart and pumps it round the body. This is called systemic circulation. Oxygenated blood is ...

The new drug sotatercept stops the remodelling of the pulmonary vessels and even helps patients with advanced pulmonary arterial hypertension (PAH) who have not yet been treated.