Patient: Description of condition (onset time, main symptoms, hospital visited, etc.): (1) Ultrasound findings: aorta is not wide, internal diameter 9MM, pulmonary artery is widened, internal diameter 12MM (2) Left heart is mildly enlarged, left ventricular diameter 26MM, right heart is not large (3) No significant abnormalities in the morphology and structural opening and closing of the valves (4) No significant echogenic loss in the interatrial septum, echogenic loss in the peri-ventricular septum is detected about 6MM (5) CDFI: systolic left-to-right shunt signal was detected at the ventricular level, peak flow velocity 3.7M/S, differential pressure 53MMHG (6) Left heart function measurement: EF=76%, FS=36% Ultrasound suggests: congenital heart disease septal defect (perimembranous) left ventricular systolic function is normal None There is no possibility of healing How to eat.