The severity of pulmonary artery segment protrusion depends on the severity of pulmonary artery segment protrusion; obvious protrusion of pulmonary artery segment is considered to be more serious, and mild pulmonary artery segment protrusion is not a big problem. Pulmonary artery segment protrusion is diagnosed by chest X-ray, chest X-ray suggests that there is pulmonary artery segment protrusion, it is recommended that further cardiac ultrasound examination, to see whether there is obvious widening of pulmonary artery internal diameter, the right ventricle has obvious enlargement. If the patient has obvious chest tightness, shortness of breath, decreased blood pressure, increased heart rate, it is recommended that further blood gas analysis and D-dimer, if necessary, the pulmonary artery CTA examination to clarify the presence of pulmonary embolism. Pulmonary embolism is a critical condition with a very high mortality and disability rate and is very serious, so clinical findings of a prominent pulmonary artery segment must be further examined.