Differentiating Acute Myocardial Infarction from Myocarditis: Diagnostic Value of Early- and Delayed-Perfusion Cardiac MR Imaging -- Laissy et al. 237 (1): 75 -- Radiology

This article describes the difference between the enhancement patterns in acute myocarditis and infarction. The differentiation is pretty straightforward. Infarcts show a defect on first-pass imaging, with a subendocardial-transmural enhancement corresponding to an infarct territory. Myocarditis shows no change on first pass imaging with mid-myocardial to epicardial, patchy areas of enhancement.

This is also illustrated in the accompanying images blog in the entry of Tuesday, 01 Nov.

Link: Differentiating Acute Myocardial Infarction from Myocarditis: Diagnostic Value of Early- and Delayed-Perfusion Cardiac MR Imaging -- Laissy et al. 237 (1): 75 -- Radiology.