患者　男,4岁。自幼发现心脏杂音,易感冒,活动后心慌、气短,生长发育无明显异常。体检:无杵状指,无紫绀,胸骨左缘2～3肋可闻及连续性杂音,P2 亢进,红细胞计数4.8×10 12 /L ,血红蛋白13 5g/L ;血清总胆红素6.8mmol/L。心脏胸部X平片示:肺血增多,主动脉结宽,肺动脉段凸,左心室增 Patient male, 4 years old. Childhood heart murmur, susceptible to cold, palpitation after the event, shortness of breath, no significant abnormalities in growth and development. Physical examination: no clubbing finger, no cyanosis, 2 ~ 3 ribs on the left sternal border can be heard and continuous murmur, P2 hyperthyroidism, erythrocyte count 4.8 × 10 12 / L, hemoglobin 13 5g / L; serum total bilirubin 6.8mmol / L. Cardiac chest X-ray showed: increased lung blood, aortic node width, pulmonary artery segment convex, left ventricular increased