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Effects of patch implantation on fibrosis in infarct bed. (Left) H&E-stained section from day 1 CP experiment showing position of patch over infarct zone. Longer arrow points to patch and shorter arrow to interface between patch and myocardium. (Middle and right) Trichrome myocardial sections showing normal myocardium in red-purple and fibrosis in blue. In these 2 representative rats, histology shows a small area of scarring in CP group and larger area of scarring in NP group.
