患儿,男,出生6 d,系孕35周早产,因“心率持续增快,多汗”急诊入院。母有“甲亢”病史3年,近1年多来未曾服药。入院体检:HR 170次/min,体重2.15 kg,皮肤潮红、多汗,前囟1.0 cm,平,突眼明显,颈软,甲状腺不大,哭吵或吃奶时心率达200次/min,安静时170次/min 左右,心音有力,律齐,无杂音,肺、腹无异常。辅检:肝、肾功能及电解质均正常。X 线胸片:心、肺未见异常。EKG 示:(1)窦性心动过速;(2)A°+150°;(3)不完全右束支传导阻滞;(4)心肌受损。甲状腺放射免疫法报告:T_35.28 nmol/L,T_4 258.9 nmol/L,TSH<0.01 mu/L、TPO 130 u/ml,诊断为“新生儿先天性甲亢、早产儿”。给予口服丙基硫氧嘧啶10mg/(kg·d),分4次,心得安2 mg(kg·d),分2次。2周后症状控制,心率控制在120～140次/min 左右,心电图恢复 Children, male, born 6 d, pregnant 35 weeks preterm birth, because “heart rate continued to increase, sweating ” emergency admission. The mother has “hyperthyroidism ” history of 3 years, nearly no more than 1 year medication. Admission examination: HR 170 times / min, body weight 2.15 kg, the skin flushing, sweating, anterior fontanel 1.0 cm, flat, prominent exophthalmos, neck soft, thyroid small, crying or feeding heart rate of 200 times / min, Quiet 170 times / min or so, strong heart sound, law Qi, no noise, lung, abdomen without exception. Auxiliary examination: liver, kidney function and electrolytes are normal. X-ray: heart, lung no abnormalities. EKG showed: (1) sinus tachycardia; (2) A ° + 150 °; (3) incomplete right bundle branch block; (4) myocardial damage. Thyroid radioimmunoassay report: T_35.28 nmol / L, T_4 258.9 nmol / L, TSH <0.01 mu / L, TPO 130 u / ml, diagnosed as “neonatal congenital hyperthyroidism, premature children.” Give oral propylthiouracil 10mg / (kg · d), 4 times, propranolol 2 mg (kg · d), 2 times. Symptom control after 2 weeks, heart rate control in 120 ~ 140 times / min or so, ECG recovery