Sutton J P, Ho S Y, Vogel M, Anderson R H
Department of Paediatrics, National Heart & Lung Institute, London, United Kingdom.
J Heart Valve Dis. 1995 Nov;4(6):571-5.
Classification of the components of the right atrioventricular valve by its anatomical configuration is problematic and needs clarification.
Fifty hearts were studied so as to analyze carefully the structure of the right atrioventricular valve and to define its component parts. Cross-sectional echocardiograms were reviewed to demonstrate the valve in closed position, and reconstructed in three-dimensional fashion.
The majority of specimens (62%) had three readily identifiable leaflets, but some (30%) could be described as having two leaflets while (8%) had four leaflets. The cross-sectional echocardiograms reviewed showed three definite lines of closure in all cases.
The eccentric placement of the anterior papillary muscle causes the leaflets to close with three lines of apposition, and this makes the valve readily distinguishable from its mitral partner. When present, extra "scallops" in the structure of the right atrioventricular valve merely allow better coaption of the leaflets. So, although the term "cusp" is less than adequate as the descriptive basis for the structure of an atrioventricular valve, the right atrioventricular valve should still be considered to be tricuspid.
根据解剖结构对右房室瓣的组成部分进行分类存在问题，需要进一步阐明。
对50颗心脏进行研究，仔细分析右房室瓣的结构并确定其组成部分。回顾性分析横断面超声心动图，以显示处于关闭位置的瓣膜，并以三维方式重建。
大多数标本（62%）有三个易于识别的瓣叶，但有些（30%）可描述为有两个瓣叶，而（8%）有四个瓣叶。回顾性分析的横断面超声心动图在所有病例中均显示出三条明确的闭合线。
前乳头肌的偏心位置导致瓣叶以三条对合线关闭，这使得该瓣膜易于与二尖瓣区分开来。右房室瓣结构中存在的额外“扇贝”仅能使瓣叶更好地贴合。因此，尽管“瓣尖”一词作为描述房室瓣结构的基础并不充分，但右房室瓣仍应被视为三尖瓣。
