"肺动脉血压过高" can be translated as "pulmonary arterial hypertension" in English.
Here, "pulmonary" refers to the lungs, "arterial" relates to arteries (the blood vessels that carry blood away from the heart), and "hypertension" means high blood pressure. So, "pulmonary arterial hypertension" accurately describes the condition of excessively high blood pressure in the pulmonary arteries.