二尖瓣的收缩期前向运动(SAM)是肥厚型心肌病的特征性表现,它的出现和时程与动力性主动脉瓣下梗阻有关。在试图阐明该运动的多项机理中,Venturi假说获得最广泛的接受。该假说认为高动力的左室射流流经一狭窄的流出道,在二尖瓣前方产生一高速的血流,根据Bernoulli方程,二尖瓣前方将减压,导致二尖瓣叶被吸向前,从而形成 Mitral regurgitation forward movement (SAM) is a characteristic manifestation of hypertrophic cardiomyopathy, its appearance and duration and dynamic aortic valve obstruction. Among the many mechanisms that attempt to elucidate this movement, the Venturi hypothesis is the most widely accepted. The hypothesis is that high powered left ventricle jets flow through a narrow outflow tract and produce a high velocity flow in front of the mitral valve. According to the Bernoulli equation, the anterior mitral valve will depressurize, causing the mitral valve leaflets to be aspirated , Thus forming