Fig. 7.

Histological analysis of cardiac structures at 4 weeks after hydrogel injection. (A) Masson's trichrome staining of multiple heart sections from the apex to the atrium in different groups. Blue staining represents fibrous tissue and red staining represents myocardium. The yellow arrows indicate incompletely degraded hydrogels. Scale bars = 1 mm at low magnification and 200 μm at high magnification. (B, C) Quantitative analysis of minimum LV wall thickness (B) and infarct size (C) based on the Masson's trichrome staining images (n = 9). ***P < 0.001, ****P < 0.0001.