pulmonary artery endarterectomyenlarged pulmonary artery treatmentmanagement of pulmonary hypertensionpulmonary hypertension surgeryoxygen for pulmonary hypertensionpulmonary hypertension therapyarterial atherosclerosisarterial cardiovascular diseasecorinary artery diseasehardning of the arteriescardiac artery diseasecauses of hardening of the arteries