感染性心内膜炎显示了源自瓣膜表面的感染的传播途径。可见心内膜表面的赘生物，并且感染蔓延到下面的心肌。
In this case, the infective endocarditis demonstrates how the infection tends to spread from the valve surface. Here, vegetations can be seen on the endocardial surfaces, and the infection is extending into to underlying myocardium.