realized in has occurrent part endocardium thickening endocardial fibroelastosis Elastomyofibrosis Endocardial fibroelastosis (disorder) endocardial fibroelastosis SNOMEDCT_2010_1_31:65457005 ICD9CM:425.3 OMIM mapping confirmed by DO. [SN]. MSH:D004695 DOID:12929 Endocardial fibroelastosis OMIM:305300 disease_ontology A heart disease in which the endocardium thickens by increase in the amount of supporting connective tissue and elastic fibers. It is usually associated with children two years old and younger. Its etiological cause is unknown. UMLS_CUI:C0014117 OMIM:226000 disease disease course