Locating Heart Attacks and Percent Damage

I have a investagator that is looking for the best way to locate a infarct in a mouse heart, a trichrome was suggested but does any one know of another way to detect infarcts. I.E. what to look for in the sample or best stain. It is more difficult since the hearts are only kept alive for 12 hours after the infarct, which is too early for a collagen type stain. There is alot of hearts and to have to stain them twice seems to be alot of work that might be able to be avoided