患儿,女,14岁。自生后5个月发现心脏杂音,生长发育落后。入院前2个月始不规则发热,体温37.9～38.8℃,无咳嗽、胸痛及腰痛。体检:消瘦,皮肤未见淤点,颈静脉充盈,双肺少量干鸣音,心前区隆起,心尖搏动弥散,心率118次/分,胸骨左缘2～4肋间可闻及Ⅵ～Ⅴ级喷射性收缩期杂音,P_2亢进,肝肋下2 cm,脾不大,杆状指(趾)(+)。辅助检查:血WBC11.2×10~9/L,N0.72, Children, female, 14 years old. 5 months after birth heart murmur, growth and development behind. 2 months before admission, irregular fever, body temperature 37.9 ~ 38.8 ℃, no cough, chest pain and back pain. Physical examination: emaciation, no bruising of the skin, filling of the jugular vein, a small amount of dry lung beeps in the lungs, swelling of the precordial area, dispersion of apical pulsations, heart rate of 118 beats / min, intercostal space of 2 to 4 at the left sternum, and Ⅵ ~ Ⅴ Grade ejection systolic murmur, P 2 hyperthyroidism, liver ribs 2 cm, spleen is not large, rod-shaped fingers (toe) (+). Auxiliary examination: blood WBC11.2 × 10 ~ 9 / L, N0.72,