ˌɛndoʊkˈɑːɹdɪəl fˌɪbɹoʊlɐstˈoʊsɪs ˌiːˌɛfˈiː ɪz ɐ ɹˈɛɹ hˈɑːɹt dɪsˈoːɹdɚ jˈuːʒuːəli əkˈɜːɹɪŋ ɪn tʃˈɪldɹən tˈuː jˈɪɹz ˈoʊld ænd jˈʌŋɡɚ.
Endocardial fibroelastosis (EFE) is a rare heart disorder usually occurring in children two years old and younger.