主动脉口狭窄(congenital aortic stenosis)可位于瓣膜部、瓣膜下或瓣膜上。如为主动脉瓣狭窄、半月瓣增厚,融合成隔膜状,中心有一小口,升主动脉往往扩张。如左心室流出道在主动脉口下5~10mm处有一纤维环或纤维带,则可形成瓣膜下狭窄。瓣膜上狭窄则由于主动脉瓣远端的主动脉壁失去弹性而形成皱褶,使左心室排血受阻。在上述三种不同部位的狭窄中以主动脉瓣膜上狭窄最少见。此症的相对发病率在我国较低。
... aortic orifice: 大动脉孔 stenosis of aortic orifice: 主动脉口狭窄 aortic valvue orifice area: 来估测主动脉瓣口面积 ...
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心脏杂音是血流从左心室到升主动脉通过狭窄的主动脉瓣口时产生的湍流引起的噪音。
A heart murmur is simply a noise caused by the turbulence of blood flowing through the obstruction from the right ventricle to the pulmonary artery.
发生在心血管系统者,多发生在感染后10 ~ 20年,可表现为主动脉炎、主动脉瓣关闭不全、主动脉瘤、冠状动脉口狭窄或阻塞、心肌炎等。
In the cardiovascular system, the infection occurred after 10 ~ 20, the performance of the aortic - yim, aortic insufficiency, aortic aneurysms, coronary stenosis or obstruction, such as myocarditis.
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