Endocardial fibroelastosis happens most often in children, and is thought to be caused by a variety of diseases and stresses, like infections and even nutritional deficiencies.

心内膜弹纤维增生症通常发生在小孩身上，且被认为是由各种疾病，说感染以及甚至是营养物质的缺乏。

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.

还有另一种病因是心内膜弹纤维增生症，即在心内膜以及心内膜下层发生了纤维化，使得心脏组织顺应性变差。