Int J Cardiol. 2018 May 15;259:116-121. doi: 10.1016/j.ijcard.2018.01.058.
Kostakou PM, Kostopoulos VS, Tryfou ES ... Olympios CD, Kouris NT.

In patients with acute myocarditis with preserved ejection fraction, 2DSTE evaluation appears to be a promising, useful noninvasive and inexpensive tool in addition to existing methods used for the diagnosis of acute myocarditis, since it seems to be able to identify myocardial fibrosis early in the setting of the disease.

https://www.internationaljournalofcardiology.com/article/S0167-5273(17)37341-2/fulltext