A. H&E staining of myocardium 1hr after intra-myocardial injection of hydrogel (black arrow).
B. Saffranin-O staining reveals presence of intra-myocardial hydrogel (black arrow) 1hr after intra-myocardial injection
C. H&E staining of myocardium 24hrs after epicardial application of hydrogel (black arrow) reveals neutrophil infiltration in the epicardium at the hydrogel-myocardial interface
D. H&E staining of myocardium 7d after epicardial application of hydrogel (black arrow) reveals presence of epicardial hydrogel