心脏横截面，箭头所指心室壁瘤，位于非常薄的室壁上。血液在动脉瘤处淤滞，使得此处形成附壁血栓。
A cross section through the heart reveals a ventricular aneurysm with a very thin wall at the arrow. Note how the aneurysm bulges out. The stasis in this aneurysm allows mural thrombus, which is present here, to form within the aneurysm.