![[左房室瓣]前尖 - 心脏 - 腔 - e-Anatomy](https://cdn.imaios.cn/i/imaios-images/web/images/eanatomy/modules/coeur-illustrations/images/v1/5e22c59d7b31865510d7ab2ba9217b65aeeeba7e7453e13c754b6a33fc16ca0d?ar=640:670&auto=format,compress&bg=FFFFFF&fit=crop&p64=NzAyLDc2Mg&t=W-W3puaIv-WupOeTo13liY3lsJY&tf=Tm90byBTYW5zIFND&tx=702&ty=762&w=350&wk=1&s=a5751be089e543e623f7b24194cd9c20)
[左房室瓣]前尖
Cuspis anterior valvae atrioventricularis sinistrae
- 拉丁语近义词： Cuspis aorticum valvae atrioventricularis sinistrae
定义
二尖瓣前叶（前瓣尖；二尖瓣主动脉瓣尖）是占据二尖瓣环周长约三分之一的瓣叶，并通过二尖瓣-主动脉帘与主动脉瓣直接形成纤维连续性。与后叶不同——后叶分为三个明显的扇贝形区域（P1、P2、P3）——前叶并不具有真正的解剖学扇贝形结构；然而，出于定位目的，其外侧、中间和内侧区域通常分别标记为A1、A2和A3。[
前叶在径向高度上通常大于后叶，但两个叶片的表面积大致相等。
前叶的腱索附着来自前外侧乳头肌和后内侧乳头肌，其中一级腱索附着于叶片游离缘，二级腱索附着于叶片的粗糙区。
參考資料
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