This endocardium lines the heart chambers as well as the heart valves.

内覆盖了脏各腔室和瓣。

Therefore the classic finding with angina is subendocardial ischemia, meaning less oxygen is reaching the region just under the endocardium.

因此绞痛的典型发现就是内下层缺，即到达内下层的氧减少。

The process tending to focus on the sub endocardium.

趋向集中内下的过程。

The muscle is enclosed on the outside by the epicardium and on the inside by the endocardium .

脏被纤维囊（包）完全包裹。

If blood flow's reduced or the myocardium is thicker, blood has a harder time reaching this deeper layer just under the endocardium, called the subendocardium.

一旦减少或肌变厚，难以到达最深层，即内下层。

Yet another is endocardial fibroelastosis, where fibrosis develops in the endocardium, the inner lining of the heart, as well as the subendocardium right under, again making the tissue less compliant.

还有另一种病因是内弹力纤维增生症，即在内以及内下层发生了纤维化，使得脏组织顺应性变差。

Finally, there's the innermost layer of the heart called the endocardium, which is made of a relatively thin layer of endothelium which is the same layer of cells that line the blood vessels.

最后，脏的最内层叫内，由一层较薄的内皮细胞构成；与位在管内壁的是同一层细胞。

Whatever the case, the heart needs blood, and if we look at the heart wall, there's three layers—the outermost layer, the epicardium, then the myocardium in the middle, and the endocardium inside the heart.

无论什么情况下，肌都需要供，我们学习壁时知道，壁有3层：最外层的外、中层的肌，以及脏内的内。