[病例] 患者陈某,女、6岁,因平时活动时气短,易疲劳,乏力而就诊。发育、营养尚好,心前区无隆起,心浊音界不大,律整,心音正常,胸骨左缘第二、三肋间有Ⅱ级收缩期杂音,柔和并限局,肺动脉瓣听诊区第二心音固定分裂,P_2亢进。X光照片示双肺血稍多,心脏不大。心电图为窦性心律,正常心电图。化验检查GOT110u,LDH241u。血沉1小时为1mm,2小时为4mm。二维超声心动图检查,左房内径23mm,右室14mm,左室舒末径39mm,均在正常范围。室间隔厚度6mm,左室后壁厚度6mm。各瓣形态活动均无异常。主动脉根部水平短轴切面及剑突下四腔心切面均可见房间隔卵 [Case] ​​Patient Chen, female, 6 years old, due to shortness of breath during normal activities, fatigue, fatigue and treatment. Development, nutrition is still good, no anterior precordial uplift, heart dullness is not big, law, heart sounds normal, sternal left edge of the second, three between the intercostal systolic murmur, soft and limited bureau, auscultation pulmonary heart valve second heart sound Fixed division, P 2 hyperthyroidism. X-ray showed double lung blood slightly more, the heart is not big. ECG is sinus rhythm, normal ECG. Laboratory tests GOT110u, LDH241u. ESR 1 hour 1mm, 2 hours to 4mm. Two-dimensional echocardiography, left atrial diameter 23mm, right ventricular 14mm, left ventricular end-diastolic diameter 39mm, are in the normal range. Ventricular septal thickness 6mm, left ventricular posterior wall thickness 6mm. No abnormalities in the morphology of the petals. Aortic root horizontal short axis view and the xiphoid four-chamber view of atrioventricular septum can be seen