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分散性主动脉瓣下狭窄(DSS)是引起左心室流出道梗阻的常见原因之一,约占先天性左心室流出道梗阻的8～30%.我们用 M 型超声心动图诊断2例,均经手术证实.现报告如下.病例报告例1:刘某某,女,16岁.发现心脏杂音11年.体查:血压90/70,胸骨左缘第3、4肋间有收缩期震颤,闻及4～6级收缩期杂音.A_2减弱.X线胸片:左、右心室增大.心电图:左心室肥大劳损,完全性左束支传导阻滞及Ⅰ度房室传导阻滞.M 型超声心动图:主动脉增宽,主动脉瓣开放、关闭正常;左心室增大,室间隔左室面下左心室流出道内见异常线条状回声;室间隔与左心室后壁对称性肥厚.手术所见:升主动脉扩大,左室增大.切开升主动脉见主动脉瓣正常,左心室流出道内有一2.0×1.0cm 大小的白色膜状物,其基部横附于二尖瓣前
Dispersible aortic stenosis (DSS) is one of the common causes of left ventricular outflow tract obstruction, accounting for about 8 to 30% of congenital left ventricular outflow tract obstruction.We used M-mode echocardiography to diagnose two cases, both Confirmed by surgery .Reports are as follows .Report as follows. Case report 1: Liu Moumou, female, 16 years old .It was found heart murmur for 11 years.Observation: blood pressure 90/70, sternal left margin of 3,4th intercostal systolic tremor, Sigh and 4 to 6 systolic murmur.A_2 weakened.X-ray: left and right ventricular enlargement.Electrocardiogram: left ventricular hypertrophy strain, complete left bundle branch block and Ⅰ degree atrioventricular block.M Echocardiography: Widened aorta, aortic valve open, closed normally; left ventricle increased, left ventricular septal left ventricular outflow tract abnormal linear echo seen echo; ventricular septal and left ventricular posterior wall symmetry hypertrophy. Surgical findings: the ascending aortic enlargement, left ventricular enlargement .Aortic dissection is seen aortic valve is normal, the left ventricular outflow tract has a 2.0 × 1.0cm size of the white membrane-like objects, the base of the transverse deposition in the mitral valve