患儿,女,5岁,38天前出麻疹,疹出4天,退后反复低烧,咳嗽,乏力,面色苍白。3日前,以双下肢浮肿、尿少、气促、恶心呕吐入院。病前无猩红热、关节肿痛史。查体:体温37.9℃,脉搏120次,血压90/60毫米汞柱,发育中等,营养欠佳,全身未见皮疹及皮下小结。双眼睑轻度浮肿,口唇微绀。颈静脉不怒张。心尖在第五肋间左锁骨中线外0.5厘米,心率128次,律齐,心音低钝,心尖区Ⅱ级收缩期杂音。双肺底细小湿 Children, women, 5 years old, 38 days ago measles, rash 4 days, repeated low fever, cough, fatigue, pale. 3 days ago, to lower extremity edema, oliguria, shortness of breath, nausea and vomiting admitted to hospital. No scarlet fever, joint swelling and pain history. Physical examination: body temperature 37.9 ℃, pulse 120 times, blood pressure 90/60 mm Hg, moderately developed, poor nutrition, the whole body no rash and subcutaneous nodules. Eyelid mild edema, micro-cyanosis lips. Jugular vein does not rage. Apex in the fifth intercostal left subclavian midline 0.5 cm, heart rate 128 times, law Qi, heart sound low blunt, apex Ⅱ systolic murmur. Double wet lungs