急きゅう性せい心しん筋きん炎えんMeaningsNoun1. acute myocarditisKanji used急hurry性nature (of a person)心heart筋muscle炎intense flameComposed of急きゅう性せいacute (illness)No-adjective心しん筋きんcardiac muscle; heart muscle; myocardiumNoun炎えん-itis (indicating an inflammatory disease)Suffix