Vision loss as the initial presentation during primary pulmonary hypertension treatment

摘要

Dear Editor,As we all know,pulmonary hypertension is a state of persistent pulmonary artery pressure above 25 mm Hg at rest and greater than 30 mm Hg during exercise.Based on the mechanism or underlying etiology,pulmonary hypertension was classified as primary with no identifiable cause or secondary because of increased pressure in the pulmonary venous or pulmonary capillary system[1].