特发性肥厚性主动脉瓣下狭窄(Idio-pathic Hypertrophic Suhaortic Stenosis,简写INSS),又称为肌肉型主动脉瓣下狭窄、肥厚性梗阻性心肌病、左室流出道狭窄等,一共有二十多种命名。本病自1957年Brock首先报告以来的二十年中,逐渐得到重视。IHSS的主要特点是以左室明显肥厚,尤其是室间隔非对称性肥厚为著。肥厚 Idio-pathic Hypertrophic Suhaortic Stenosis (abbreviated INSS), also known as muscle aortic stenosis, hypertrophic obstructive cardiomyopathy, left ventricular outflow tract stenosis, a total of two More than ten kinds of names. The disease has gradually gained prominence in the two decades since Brock first reported in 1957. The main feature of IHSS is the apparent hypertrophy of the left ventricle, especially the asymmetry of the interventricular septum. Hypertrophic