病例:男,10天,因吃奶少,哭声低3天而入院。体查:患儿精神萎靡,消瘦,全身皮肤较黑,唇稍干,前囟平,咽部无特殊,心肺正常,腹软,肝肋下1.0cm,胸片检查正常,肝功能,乙肝五项均无异常,血培养无细菌生长,血电解质在正常范围,经合理喂养,补液等治疗,患儿一般情况逐日好转。于入院第9天,突然呼吸促,面色发灰,反应差,心脏检查心律不齐,心电图提示室性早搏 Case: Male, 10 days, due to less milk, cry for 3 days and admitted to hospital. Physical examination: children with apathetic, weight loss, black body skin, lips slightly dry, anterior fontanel, pharynx no special, normal heart and lung, abdominal soft, liver ribs 1.0cm, chest X-check normal, liver function, None of the items were abnormal, no bacterial growth in blood culture, blood electrolyte in the normal range, the rational feeding, rehydration and other treatment, the general situation of children improved day by day. In the first 9 days of admission, sudden breathing, looking pale, poor response, cardiac arrhythmia, ECG prompted premature ventricular contractions